Question about CMT Hewlett Packard-COMPAQ DC7900 C2D/3.0 2GB-160GB WVB-XP SBY PC Desktop

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DC7900 power button wire?

I have a dc5700 sff and i was looking to upgrade to a dc7900 sff but they have different connections for the power button. Where do I find a new power button to fit?

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Try ebay

Posted on Jan 24, 2013

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My hp Compaq DC7900 has 5 beeps with 5 red light flashing does this 3 times. then the fan kicks on. That's all it does. Anyone know what this is?


This is a sign of a pre-video memory error. If your DC7900 has a video graphics card, that card has probably failed or doesn't have enough power. On at least some of HP's Compaq DC7900, the video card uses a PCIe x16 slot.

There are two things to consider when you choose a new video graphics card: 1) it must fit in a slot in your case and 2) your power supply must meet the requirements of the card. The small tower format of the HP Compaq DC7900 came with a 240W power supply. Most modern video graphics cards often need more power. You may need to upgrade the power supply.

I hope this helps.

Cindy Wells

Aug 13, 2014 | HP Compaq DC7900 Small Form Factor PC...

1 Answer

My HP fax machibe says Scanner failed.


Give more info like error no or something or history how it happened

Jun 26, 2014 | HEWLETT-PACKARD HP System Board LGA775 For...

1 Answer

Diskette drive (CD DVD player) of HP DC7900 powers up momentarily (for 1 sec) every 10 mins. How to stop this ?


if the optical drive still powers on even when the pc is powered off than the problem seems to lie in tha power supplys connector. it is still giving power when it is not supposed to

Mar 05, 2014 | HP Compaq Dc7900 Sff Desktop Core 2 Duo...

1 Answer

Checksum error, corrupted image


Where are you seeing this error? Upon starting the computer ? or opening a file ?

May 27, 2012 | HEWLETT-PACKARD Hewlett Packard DC7900 SFF...

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I'm having a problem with HP DC7900 SFF. The Video Card shared memory is 1GB. according to there technical paper maximum should be 384MB only. I'm using winxp sp3 with 2GB memory. How can i change...


The amount of allocated shared video memory is configured in the BIOS configuration.
Go into the BIOS - video memory to change the amount of video RAM..

Jun 20, 2011 | HP Compaq DC7900 PC Desktop

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I'm having a problem with HP DC7900 SFF. The Video


The amount of allocated shared video memory is configured in the BIOS configuration - video memory.

Jun 20, 2011 | HP Compaq DC7900 Small Form Factor PC...

1 Answer

My DC7900 SFF beeps 5 time and red led flashing


> 5 beeps

Something is wrong with some of the hardware.

If there is an add-in video-card, make sure that it is correctly "seated" into its slot on the motherboard. It's best to completely remove the card, and then re-insert it.

Similarly, check that the RAM is properly "seated".
If you have more than one stick of RAM on the motherboard, remove some of the sticks, until there is only one stick still connected, and try again.

If there is only one stick of RAM, remove it, and borrow a stick of RAM from a friend, and try it.

Beyond that, take your computer to a computer-store, for professional trouble-shooting.

Nov 12, 2010 | HP Compaq DC7900 PC Desktop

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