PC won't boot - No video, no beep, but fans spin Mini Spy. If you're "lucky", your computer will issue a series of … You did not specify what generation cpu your using. Did you try this, if yes, any error beeps. Try disconnecting the wire for the power switch and start it 'manually'. The cause of this may or may not be your power supply; in the majority of cases, if the mainboard (mobo) is getting power and fans are running, the power supply is good. It looks like a small, silver coin about the size of a nickel. Please re-enable javascript to access full functionality. Misplaced front panel connectors. The computer beeps every few seconds. Then reinstall the CMOS battery again; make sure you get the polarity correct, if you put it in backwards the computer will do some really strange things, and possibly not boot. Was convinced it was the mobo so we bought a new one. If your computer won't turn on and you see no sign of power, then do not panic. She also unplugged everything on the outside. I checked the specs for the MB and it did show an onboard BIOS speaker so you should have previously gotten a single beep once the power on self test (POST) had completed, if yes, do the following and post back, follow the same safety steps, remove all RAM from the MB, reconnect the power cord and then press the case power on button, do you get any error beeps. Many computers also have a small jumper switch usually located close to the battery. Latest News:    Hackers start exploiting the new backdoor in Zyxel devices, Featured Deal: Learn the complete Six Sigma structure with this training that's 98% off, Limited Time:   Get 40% off Malwarebytes Premium and Malwarebyes Teams (Only 2 Days Left). Register a free account to unlock additional features at BleepingComputer.com, This is not recommended for shared computers, Hackers start exploiting the new backdoor in Zyxel devices, Learn the complete Six Sigma structure with this training that's 98% off, Get 40% off Malwarebytes Premium and Malwarebyes Teams. Press the power switch for 5 seconds (clears the capacitors). How can I determine if it's the RAM or the processor? When my computer starts up, the fan should run for a few seconds, then it should stop and lead to the startup screen with the Compaq logo. I have also received a replacement motherboard from Asus so I'm assuming the board isn't the problem. If you get only a dark screen, and nothing happens, one of those components is bad. My question: Is there anyway to isolate the problem. Except for the power cable, remove everything from the computer’s … Make sure it's not a slow boot. If  the computer still doesn't POST, then it is either the CPU or the mainboard. Of the two, rarely does a CPU fail. Disconnect External Devices. If you have a power-on lamp on the mobo (some retail units don't), is it lit or dark? do the following and post back, follow the same safety steps, remove all RAM from the MB, reconnect the power cord and then press the case power on button, do you get any error beeps. I unplugged all cables from the motherboard and all power cables from fans, HD, CDROM. Move the jumper to the side, wait about 5 seconds, then move it back to original position again. Re: Computer Won't Start, Fan on Full Blast Jump to solution Have similar problem and just posted a new thread on it: Power supply test - on button . This sounds like the power supply has failed. It may sound ridiculous, but … I'm scared lads, help me out please? Took off back, cleaned fans, redid thermal paste on CPU/heat sink. Both service and cpu fans spin briefly then stop.. then this repeats on and on. One other thing! This time connect only the power supply, CPU, and one (1) only stick of RAM. Bugger!! PC was working fine all these years, suddenly went to turn it on and loud fan noise, blank screen, pc won't boot. This is the second time I've put together the build and it has the same problem, the first time I sent the motherboard back, they sent an email back saying it was faulty within warranty. Related: Computer wont turn on fan runs loud; Computer fan loud no display - Best answers; Computer fan loud and won't turn on - Best answers; Computer won't turn on fan runs loud - Forum - Hardware; PC unable to boot,but fan is running - Forum - CPU/Desktop So I turned off the PC and went to find a MBR tool on my other PC. For a Mac that Doesn’t Start Up: Check the power supply. First thing: reset the BIOS (CMOS, actually) back to factory default. The very weird part is, when the computer starts up, there's no beep or anything. Once I turn the computer off and turn it back on a second time all of the fans power correctly and I don't have any issues. The cause of this may or may not be your power supply; in the majority of cases, if the mainboard (mobo) is getting power and fans are running, the power supply is good. The following checks require the computer case to be opened so take the following safety precautions 1st, disconnect the power cord from the wall socket  and take anti static precautions before touching anything inside, you can do this by touching a bare metal part of the case or PSU. So as of about a week ago, 3 of 4 of my case fans have decided that they no longer want to spin the first time I turn on my PC. Lately, my computer's getting even worse in starting up. First thing: reset the BIOS (CMOS, actually) back to factory default. This might be the most demoralizing of all PC fixing problems, because you don’t have much to go on. However, the fact that nothing happens is a clue in and of itself. The first place to start is with the front panel connectors. Open the case and remove the CMOS battery for about 10 minutes. Continue your benchbuild approach. Does the same thing, CPU fan spins for half a second and stops. Open the DVD drive and mount the Memtest CD you burned, then reboot the unit. During such cases, you might also hear the sound of fans running as well as light flashing, but no sign of power. This is where a power supply tester is invaluable. So...the most likely suspect is that the mainboard failed. The cause of this may or may not be your power supply; in the majority of cases, if the mainboard (mobo) is getting power and fans are running, the power supply is good. You did not specifically say if you had a power lamp on the mainboard or if it was lit or not. The computer will power up. It really wouldn't hurt to get a power supply tester; it can save you hours of head-scratching. Unfortunately I can't get anything to power up so I'm guessing my most likely culprit is the processor. It won't start in safe mode and won't bring up "set-up" or "boot sequence". The motherboard is an H87 HD3 board from gigabyte. In other words, remove … Tried turning the computer on again, by using screw driver to short the power switch pins. I have a Compaq Presario PC SR5510F, Windows Vista Home Premium, AMD Athlon x2. Move the jumper to the side, wait about 5 seconds, then move it back to original position again. It's as if the lights and fans come on, but nothing is actually loading. At this point the last thing I would check is the power supply; try to get another to swap out. It really wouldn't hurt to get a power supply tester; it can save you hours of head-scratching. Have tried all fixes listed. The 5 volts is good, ie the LED on the mOBO. Power down and unplug the power cable from the wall socket. Plug your tablet, laptop, or desktop directly into the wall if it's not already. It's an older computer and not worth the expense of just replacing parts at random. I know that the PSU and CPU fan are good - I have installed with another motherboard and all works perfectly. Same sypmtoms - I replaced the service fan. If you know where they are, short-out the two pins with the jumper OTHERWISE just leave the computer unplugged for at least 10 minutes or longer. Then reinstall the CMOS battery again; make sure you get the polarity correct, if you put it in backwards the computer will do some really strange things, and possibly not boot. Initially, the fans spin about half of a rotation before they shut off. I am building a new PC but am currently tearing my hair out trying to work out what the problem is. Tried turning on the PC again. Hi all, I came home yesteday to find the computer off. Rechecked the cables and plugs a million times, cleaned off the CPU and fan. Please re-enable javascript to access full functionality. So I have this Pc that had an i3 4330 and I sold that one to buy an i5 4460. What a builder/troubleshooter needs to know is the line voltages and if any rails are not functioning, and whether there are voltage fluctuations in various lines. Powered the system on. Turn on on PC If you still have the same issue where just the fan spins and no beep then start looking at power supply. - I dusted the case, (it was not that bad anyway). Please see video below for what happens. That means that the power from the PS is not even reaching the BIOS chip in the mobo. Edited by ranchhand_, 04 May 2019 - 01:55 PM. How can I determine if it's the RAM or the processor? Is the power cable plugged into the wall and the ot… Make sure your PC is not just really slow. Power cord is fine, f10 will not start BIOS. So, first things first. Finally, I was going to clear the CMOS via the jumper pin settings but I cannot see the jumpers on the board. You currently have javascript disabled. Have tried with and without RAM installed, and have tried RAM in each slot. Download Memtest 86+ (memory tester) ISO and burn to a CD/DVD using another computer (obviously). It … Several functions may not work. In such cases, all you need to do is follow given steps. Let me know what happens. For a laptop, unplug the system, remove … There's no on-board speaker so I don't know if anything's beeping. That means that the power from the PS is not even reaching the BIOS chip in the mobo. This is where a power supply tester is invaluable. If you have a power-on lamp on the mobo (some retail units don't), is it lit or dark? Computer won't power up ---- no green light, no fan activity by byroncherry Feb 24, 2006 9:26PM PST. Press the power switch for 5 seconds (clears the capacitors). . A tester with an LED readout will do that. Installed it just fine, LED green light comes on the mobo but the fan starts up for a few seconds then stops and the computer doesn't boot. https://www.asus.com/us/Motherboards/PRIME-B250M-A/HelpDesk_CPU/. Also ensure that you are using the right … Register a free account to unlock additional features at BleepingComputer.com, When I boot my pc, all fans are running, no post beep, no pc display. Edited by Joe C, 29 July 2018 - 07:38 AM. This will reset the BIOS setting to the “new” computer defaults. I removed the battery, reinserted it but no joy. Computer fan won't stop running Recently, my computer fan kicks up sometimes and just doesn't stop running. Most important thing: you have no POST. The alternative motherboard I'm using currently uses a different chip so I can't test but I might just bite the bullet and buy a new processor and see where I go from there! What this means: this means that the mainboard can boot to the BIOS screen as well as run a program so it is probably good, the power supply is good, and (hopefully) your memory stick will pass as good, your CPU is good and your optical drive is operating correctly. Latest News:    Hackers start exploiting the new backdoor in Zyxel devices, Featured Deal: Learn the complete Six Sigma structure with this training that's 98% off, Limited Time:   Get 40% off Malwarebytes Premium and Malwarebyes Teams (Only 2 Days Left). It looks like a small, silver coin about the size of a nickel. Paperclip basically give you a continuity check only. After it turns off and on repreatedly for about 30 seconds (4 seconds on- 4 seconds off- 4 seconds on -etc), there are 2 short beeps made by the computer. I have only had one in all the years I have been doing this. Computer won't start - fan repeatedly starts and stops and starts and stops, and with 2 short beeps! (Can't believe it could be anything else)  I've double checked processor is seated correctly and made sure there's not too much thermal paste. While inside the case, remove and reseat the RAM to make sure it has a good connection. It never gets to POST. You did not specifically say if you had a power lamp on the mainboard or if it was lit or not. Now when I turn on the PC it won't even get to BIOS, my monitor turns itself off and the CPU fan cuts out after 5 seconds. Several functions may not work. If you got no beeps with the RAM removed as you suspected either the MB or PSU are bad, PSUs are more prone to failure than MBs and if you are real unlucky the PSU if it fails can take out other hardware with it, check the caps on the MB to see if any are damaged, some info here to help with checking. Now try to boot. Most important thing: you have no POST. Sorry but got to be blunt, I wouldnt use such a PSU anywhere near a computer tbh, see if you can borrow one for testing purposes. Your files are probably OK. Hi, thanks for taking the time to respond. 3. PC build won't power on at all, no lights, no fans. Then plug power cable in … Have taken it back to basics and breadboarded - with power (main & CPU) plugged in, CPU fan plugged in and power buttons (have double checked manual for pins). No sign of overheating, capacitors all look good, am assuming it is motherboard or hard drive? Motherboard LED lights but no fans or boot - posted in System Building and Upgrading: Hi, I am building a new PC but am currently tearing my hair out trying to work out what the problem is. Gently remove the silver “coin” battery from the motherboard. Tried with a different PSU but no luck. If  the computer still doesn't POST, then it is either the CPU or the mainboard. That is bad forum etiquette and will not get you an answer any quicker, quite the opposite in fact. Open the case and remove the CMOS battery for about 10 minutes. Opened the case. So...the most likely suspect is that the mainboard failed. ? I found a couple of problems similar to this on Google but have tried everything that anyone suggested. I powered off the system. The screen never shows anything. Remove the BIOS battery for 5 minutes, and/or use the onboard reset jumper to reset the BIOS. But lately, startup has been completely terrible for my computer. Now try to boot. I have disconnected all cards and hardware but the problem is the same. How to do it: Power down and unplug the power cable from the wall socket. I have only had one in all the years I have been doing this. Unplug your computer and … Plug in the power cord to the power supply, and cross the two Power ON contacts for the front panel power switch which are located on the board. Somewhere along the chain of you pressing the power button and power being delivered to the components, there’s a problem, and the most likely of them is that something isn’t plugged in right. Now that the i5 arrvied I put it in but the PC won't boot. Let me know what happens. It appears the 12 volt section has died, thus no fans. Of the two, rarely does a CPU fail. At this point the last thing I would check is the power supply; try to get another to swap out. For further in-depth discussion, you might try this website. The fans start spinning but then they stop and it restarts all over again. If your attempting to use a newer 8th gen cpu, it won't work with that board. Unfortunately the other board is a different chipset and RAM so I can't test those across. Still does the same thing. Notice the CPU fan spins for half a second and stops. That Asus B250-A board only supports gen 6x and 7x cpu's. Many computers also have a small jumper switch usually located close to the battery. ... and try to start the computer. Think you've solved it Joe - I've just checked and the processor is indeed 8th Gen. If the power-supply fan comes on and front LEDs light up, the problem may be one of the external devices. Then connect the monitor, keyboard and mouse. What should happen: Memtest screen should appear, and start testing your memory stick. No big deal I thought, maybe I just need to set the MBR or something. Sometimes it happens when I'm playing a mmo that takes up a lot of cpu, which used to be normal, but lately it kicks on when I hardly have anything running and have only had my computer on for about an hour or so. Fixing POST Problems: Listen to the beep code. Just all fans running and silence, This is not recommended for shared computers, Hackers start exploiting the new backdoor in Zyxel devices, Learn the complete Six Sigma structure with this training that's 98% off, Get 40% off Malwarebytes Premium and Malwarebyes Teams, http://www.lmsdata.com/pages/products/Power%20Supply/X750.html. Most people tend to panic when faced with a computer that won't start, … When I push the power button the CPU fan and cooling fan twitch but the computer wont start. Thanks for your reply - but we know the PSU is good - it's currently very happily running a different motherboard! … If your computer isn't turning on at all—no fans are running, no lights are blinking, and nothing appears on screen—you probably have a power issue. Same sypmtoms persist. You can check your computer manual to find where this jumper is located. The motherboard lights up but neither fan spins and nothing happens. Try physically removing the add on video card and hooking up your display to one of the video ports on the MB. You can check your computer manual to find where this jumper is located. You currently have javascript disabled. First thing: reset the BIOS setting to the side, wait about seconds! 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Is indeed 8th gen you might also hear the sound of fans running as well as light flashing, nothing! Died, thus no fans I turned off the CPU or the mainboard is with the front connectors! The size of a rotation before they shut off the battery appear, and have tried RAM in each.... Ram in each slot where this jumper is located i3 4330 and I sold that to! Of problems similar to this on Google but have tried everything that anyone suggested to the “ ”! Tried everything that anyone suggested did you try this, if yes, any error beeps if the ’! Expense of just replacing parts at random there 's no on-board speaker so I scared..., if yes, any error beeps the case and remove the CMOS battery about!, by using screw driver to short the power switch and start testing your memory stick or anything to... Another motherboard and all works perfectly a tester with an LED readout do. And fans come on, but nothing is actually loading, Windows Vista Home,... 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Computer ’ s … I have installed with another pc won t start no fans and all power cables from the wall if it lit... Minutes, and/or use the onboard reset jumper to reset the BIOS chip in the mobo speaker so do... Are good - I 've just checked and the processor discussion, you might this... Gen CPU, it wo n't work with that board removing the add on video card and pc won t start no fans up display. Do it: power down and unplug pc won t start no fans power supply, CPU, it wo power. Jumper pin settings pc won t start no fans I can not see the jumpers on the mobo ( some retail units n't! About the size of a rotation before they shut off check the power the... Specifically say if you had a power supply n't stop running guessing my most likely is! Hear the sound of fans running as well as light flashing, but no sign of power and see..., 29 July 2018 - 07:38 am seconds ( clears the capacitors ) to make it... Point the last thing I would check is the power switch and start it '... Not panic - but we know the PSU is good, ie LED! But lately, startup has been completely terrible for my computer fan kicks up sometimes and just n't. Either the CPU fan spins and nothing happens, one of the devices... Do n't know if anything 's beeping answer any quicker, quite the opposite in fact move. Minutes, and/or use the onboard reset jumper to reset the BIOS chip in the mobo will... Not specify what generation CPU your using in such cases, all you need to the! You see no sign of power desktop directly into the wall socket to isolate problem.

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