black monitor screen

February 1, 2012 at 17:37:51
Specs: Windows XP
I am having the following problem...any suggestions........, now I get three short beeps when
the power button is pushed in, with nothing on the monitor. I swapped
monitors, and the same 3 short beeps with the PC power remaining on, but the
monitor remains black. I reseated the Memory card (256 MB SDRAM) and reseated
all cables. Same 3 short beeps. The processor is an Intel Celeron 1.2 GHz,
running Win XP Home SP3. I removed the 3V CMOS battery and it read 0 V. I
replaced with a new 3V battery but the 3 short beeps remain. I would
appreciate any further assistance.

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February 1, 2012 at 17:50:55
There is nothing wrong with your monitor.
usually three beeps is is a graphics failure. Does your motherboard have onboard graphics or a plug-in graphics card?

Goin' Fishin' (Some day)

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February 2, 2012 at 11:03:57
Unfortunately I don't know the answer to this.....I just know everything worked fine until I cleaned the dust out of the inside.....and this is the 4th time I have done this with no problem before???

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February 2, 2012 at 11:45:49
Try removing the ram and cleaning the dust off them then put them back in and turn on again.

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Related Solutions

February 2, 2012 at 13:01:27
Since it sounds like you easily removed the Cmos battery, I'm assuming you have a DESKTOP computer.

Celeron 1.2 ghz , 256 mb SDram

It sounds like you have an OLD mboard.

Check your mboard for bad capacitors....

Some mboards develop this problem - electrolytic capacitors were installed on them that were not properly made, and they fail eventually - the mboard manufacturer didn't know they were improperly made at the time the mboard was made.

Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .

What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.

Pictures of blown capacitors, other components, power supplies, fried Athlon cpus, etc.:

If your mboard has an onboard - built into the mboard - graphics adapter, only, the video port you plug the monitor into is on the back of the case where most of or all your other ports are.

If your mboard does not have an onboard graphics adapter, there is no video port there where most of or all your other ports are - but there is a video port on one of the cards in a slot space by itself (if may have two video ports).

If your mboard has an onboard graphics adapter AND a graphics adapter installed in a slot space, you have two (or more, e.g. three) video ports. In most cases when you install a graphics adapter card in a mboard slot (that's AGP or PCI-E X16), the video port(s) for the onboard video does (do) NOT produce video - only the video port(s) elsewhere on a card in a slot space do.

You're definitely getting an error beep pattern but what it indicates varies depending on which bios version the mboard has.
If three beeps DOES mean your mboard is having a graphics problem

- if you have ONLY an onboard graphics adapter, your mboard is probably damaged and if so it must be replaced

- if you have a graphics adapter on a card installed in a mboard slot.....

- make sure the card is all way down in the slot it is in. Remove the AC power to the case BEFORE and while you're fiddling with the card.

- the card MUST be fastened down at the metal bracket end so that it can't move upward. Some mboard slots also have a plastic latch that can be used to hold down the card on the inner end of the slot as well

- if the card WAS NOT all the way down in it's slot, and/or if it WAS NOT fastened down at the metal bracket end, or if you unplugged or plugged in the card without removing the AC power to the case, or if the card has a fan on it that has stopped spinning, the card's circuits or the slot's circuits or both may have damaged.

(If the graphics card has a fan that has stopped spinning, it will probably be difficult to get the fan blade on it to move when the case has no AC power, and it won't spin while booting when you restore AC power),

- if it was out of whack and making sure the card is all the way down in it's slot and is fastened down at the metal bracket end does not cure your three beeps error problem when you restore AC power, then the circuits on the card or in the mboard slot or both are probably damaged.
- if your mboard also has onboard graphics, try removing the card and connecting your monitor to the onboard video port.
- if you mboard does NOT also have onboard graphics, you need to try a different graphics card installed in a mboard slot and connect your monitor to the video port on that.

"....removed the 3V CMOS battery and it read 0 V. I
re....placed with a new 3V battery but the 3 short beeps remain."

Obviously the three beeps have nothing to do with you having a supposedly dead Cmos battery.

When you have video again and your computer is booting normally, when you have....
- removed the Cmos battery and installed a good one again correctly so it's polarity is correct
- or - when you have moved a jumper on the mboard to clear the Cmos (user) contents, then have moved it back

... you will get a message while booting "Cmos Checksum Error" or similar - you may be prompted to go into the bios Setup by pressing a key, or press another key to continue booting the computer.
You must go into the bios Setup and set at least the current Date and Time to get rid of that message while booting. In some cases you may need to change other bios settings from the default setting as well. Save bios settings.

If the "Cmos Checksum Error" or similar message does not go away while booting after you setting at least the date and time in the bios
- the Cmos battery is installed backwards - the + on it should be showing when it is installed
- or - the contact that touches the top of the battery is bent away from the battery - remove the battery bend that contact towards the bottom of the socket - install the battery again
- or - the battery is installed correctly, the top contact is fine, but there's corrosion deposits in the socket - clean off the corrosion deposits in the socket and on the underside of the top contact - household vinegar works well.

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