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My pc won't boot. No beep upon power up, nothing on screen. I've swapped the PSU - no change. I've disconnected the drives and removed all but one memory simm - nothing. So the BIOS isn't getting past the first step. Suggestions?

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  • s_ramsey2983 May 10, 2010

    Thanks, tried that but still dead so it looks like the motherboard has had enough!

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Unplug it open it take out annd cards, unplug any drives accept the hard drive and find the little battery, take it out and connect the two contacts where the battery was for a couple of seconds now plug it back it and try to start it up

Posted on May 08, 2010

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This is not a big problem dude. Your CMOS battery is finished. Replace it and everything will b fine. also remove the ram and rub the golden plates with a rubber and fix it again. I hope your PC will work fine.

Abhishek Mukherjee
Khragpur, West Bengal, India

Posted on Aug 19, 2010

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1 Answer

Pc won't boot


Can you get into the BIOS at all? Not sure what your motherboard is, but usually F1, ESC, DEL, or F10 get you to BIOS.

Without a diagnostics card, or built in diagnostics like some gaming or server boards have, the beeps may tell you what is wrong if you go to the manufacturer web site and look in your product manual.

If you can get to BIOS, some have a restore function to get you back to a different state, but even if that is not the case, you may be able to see something like a bad drive or memory chip being unrecognized that will identify the problem. If no to the BIOS or the BIOS was no help continue on:

At each step, if the same beeps happen, reconnect the device and move to next and reboot. Power off completely between steps and unplug the PSU.
1) Disconnect cd and hard drives, try to boot.
2) Remove memory and try to boot.
3) If motherboard has built in graphics, remove video card.
4) Lastly, remove everything one at a time till you get to the BIOS with no beeps. If nothing but your monitor is connected, and you still get the same beeps, the motherboard or CPU may be faulty.

If removing one item, ie the CD drive, allowed the PC to boot, then try a different cable, or IDE/SATA port. If memory removal allowed boot, then try one at a time in your main memory slot until you identify the bad module and replace it. If the motherboard boots with no VGA card, then that is a likely culprit, but switch to a higher power PSU and see if that allows you to boot. (some cards like the 6790 give messages to say you don't have enough juice, while the 4870 just makes the motherboard beep because no video device is attached technically)

Motherboards aren't the easiest to debug, but if you have patience, you will be able to eliminate all possibilities and identify the root cause of the problem.

Oct 08, 2012 | EliteGroup K7S5A Pro Motherboard

1 Answer

My computer (3.0 GHz Pentium 4 with Asus P4P800-E Deluxe mobo) will boot to the POST screen, and it successfully identifies all of my hardware (memory, hard disk, DVD-ROM drive, etc.), but then won't...


Checked your RAM chips? Remove them and boot up and see if it will beep. If you have another DVD drive, swap it and try again. The board battery rarely goes, and only change it when it is not keeping the date/time etc, it won't help in outputting video.

Sep 10, 2011 | ASUS P4P800-E Deluxe Motherboard

2 Answers

Pc wont boot, MCP73PVT board, i have checked the ram, processor, heat sink and psu,cmos batt and still no joy, its starts for 4 seconds and turns off, all fans come on but nothing else no beeps


Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your "((MOTHERBOARD TO THE HARD DRIVE))" make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error hope this helps

May 21, 2011 | Packard Bell (181368) Motherboard

1 Answer

Dell PowerEdge 1600sc server won't boot.


> black screen & flashing cursor ...

Damaged boot-record on the disk-drive???

Was it configured to try to boot from 'A:' ?
Disconnect the hard-drive & CD/DVD drives.
Put a diskette into the drive, and see if it tries to find a boot-record on the diskette.
If it tries, then it has P.O.S.T.'d correctly.

> no beep codes

When it worked, did it beep _once_ when P.O.S.T. completed?

Taking out the RAM _should_ cause some beep codes, i.e., "no RAM".

> anyone?

Replace the monitor?

Replace a dead video-card?
Or, add-in a video-card, and connect a monitor to it, leaving the original monitor connected to the original video-card. One of the two displays should show the P.O.S.T.


Jun 12, 2010 | Dell PowerEdge 1600...

2 Answers

Motherboard power is on but cannot display screen, the monitor is black or no screen.


your problem could be almost any of your hardware components
the best way to detirmine wich one/how to fix it is with a process of illimination. You should do this by switching your hardware components with known good ones.
being a display problem the order i would test with is this.
  1. disconect everything but the screen
  2. swap screen for a known good one
  3. disconect graphics card and try the onboard (if no onboard try another gc)
  4. test psu (power supply unit) this can be done with either a psu tester, multimitre or try with another psu
  5. try removing all your RAM, when you boot if your system beeps a couple of times you know that your motherboardand cpu are good. if it doesnt beep it is probably your motherboard or cpu.

Oct 14, 2009 | ASUS P4P800-MX Motherboard

3 Answers

I put this tower in the corner for a few months, board lights up but no video (on board) when turning on, no signal message on monitor ,tried a pci video card and still nothing Worked fine prior to...


Disconnect all devices from the power supply EXCEPT the motherboard
Remove any extra cards including video etc.(plug monitor into the onboard)

If you hear any beeps these can indictate where the fault is.
either of these sites below will help you further with that

Beep codes Pc

More beep codes

Power up the pc and see if the fans are working.
If not then double check the power connections to the board.

If you still have no fans it is time to suspect the power supply as the probable cause.

If the fans worked then you should have gotten a display which told you there was an error and offering you a chance to go into the BIOS. ignore it and shut down the PC.

Now connect one drive only and boot again.

Repeat that until you identify the component that is giving you a problem.

Once you find the problem then remove or disconnect and carry on with the rest to see if another component might also cause a problem

If there is only one problem device then you may want to investigate that device further, Unless you don't mind replacing it

Oct 12, 2009 | ASUS MB P5KPL-CM C2D LGA775 INTELG31 ICH7...

3 Answers

Acer Aspire AM1640-U1401A has black screen-@ boot attempt.


Had this issue with two Acers of similar make. Replacing the Motherboard resolved the issue on both.

Sep 28, 2009 | Acer Aspire AM1640-U1401A Desktop PC

1 Answer

My computer stopped showing anything on the screen.


Usually if the fans come on, you have no video output and not much else it is indicative of a motherboard (mobo) problem or failing power supply (PSU). You can self-diagnose this by removing (with the power off - of course) the memory sticks, the power plugs for the hard drive and cd-roms, etc. If you do this the computer should beep and give you different error messages on the screen. If you are getting no video output and you have tried another video card then it is more than likely a bad PSU or mobo. If you have another PSU handy you can swap it out (if it has the correct connectors). While you have your case open look at the capacitors (caps) on the motherboard. They look like small soda cans. If any of them are swollen on top or are leaking stuff then they are bad.

If you do get error messages on the screen then add components back one at a time and see what changes in the computer's start up. Write down the beeps (see if they are long ot short). Also make sure you have one hand touching the metal case to dissipate static electricity, before touching internal components.
Post back with what you find out, or for more diagnostics.

Mar 16, 2009 | HP Pavilion a1410n (ER890AA) PC Desktop

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