Question about HP Compaq DC7900 PC Desktop

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My DC7900 SFF beeps 5 time and red led flashing

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> 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.

Posted on Nov 12, 2010

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Posted on Jan 02, 2017

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1 Answer

Hp 8000 Solid Red light


desktop small form factor, SFF, (not silly fat frog)
no statement as to where lamp is, I'll guess, FRONT.
just the light bothers you, only..?
why not RTM read the manual to learn what it means.?
so where is said LED lamp, ? front of case on the SSF case?
HP calls it, and searches only work with this.
HP Compaq 8000 Elite Small Form Factor PC./
im reading your manual now for you at HP.com
my guess is lamp 5, (pwr) is not green now but is red
green means power ok, red means, not ok.,
page 2:
if flashing , the flashes are codes, what is your flash code if flashing
if not this LED then say which one?
green on 5 means ok. power ok, no errors. red bad.



sff-s5z5x1uvxsiidstn2afwkml2-3-0.jpg http://h10032.www1.hp.com/ctg/Manual/c01957825


the flash codes are here. page 47 ,

http://h10032.www1.hp.com/ctg/Manual/c01960471

you stumped me, the service manual shows no steady red.
why not ask at Hp.com

more manuals here
https://support.hp.com/us-en/product/hp-compaq-8000-elite-small-form-factor-pc/4065894/manuals


hp forum here.
http://h30434.www3.hp.com/

May 05, 2017 | HP Computers & Internet

1 Answer

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

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You need to find out what motherboard it is. Then, see if that motherboard can handle that processor.

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Dc 5000 sff. wont power up. green light on motherbd flashes. if power on button is pushed, the front green led blinks too. I have replaced the pwr supply w/no change.


make sure both the 4 pin and 20 pin connectors are firmly installed. if the mobo light flashes how many times does it flash, do you hear any beeps?

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Forgot the combination to the lock. Is there a way to retrieve the combination or return it to its factory default combination 1, 2, 3, 4, 5


The instructions below are copied from the programming instructions (page 11):

ERASE ALL PROGRAMMING
(The "out of box" factory default will be restored)
1. At the back of the lock, remove the screw at the bottom of
the lock housing and remove the cover.
2. Take out the battery pack and remove battery power by disconnecting
the battery pack.
3. Plug in the (provided) male shunt connector into the yellow
wire female connector.
4. With shunt connector connected, re-connect the battery
pack. The lock will immediately sound 3 short beeps (if
these 3 beeps are not heard, then restart at step 2).
5. The lock will then sound more slow beeps, 1 beep for every
second it takes to clear the memory.
6. After a few more seconds, the LED will slowly alternate between
flashing red and green--disconnect the yellow wire
shunt connector.
7. The LED will continue to slowly flash green and red for 25
seconds. To enroll Function Cards, proceed immediately
as follows:
• With the lock LED slowly alternating between flashing
red and green, present the Function Card #1
to the lock. The lock will sound 5 slow beeps.
• The lock LED will flash green rapidly. The lock is
ready to enroll the Function Cards.
• Re-present Function Card #1 to the lock. The
lock LED will flash green then red, with two beeps
(indicating the card was enrolled successfully).
• Present Function Card #2 to the lock. Again, the
lock LED will flash green then red, with two beeps.
• Continue to present, in order, Function Cards 3-
9. Each time a new Function Card is presented, the
lock LED will flash green then red, with two beeps.
After the 9th Function card is presented, the lock LED will flash
green twice, sound two beeps, and will then remain silent,
ready for use. Note: If the lock continues to beep after presenting
the 9th Function Card, check to verify that the yellow
wire shunt is disconnected.
Note: If you only wish to use the first 3 Function Cards, simply
allow the lock to "time out" after 30 seconds.

Here is the link to the complete instructions, in PDF form. You will need Adobe Acrobat or equivalent to view them:

http://napcosecurity.com/download/PL3000_WI1280A.04_PROG.pdf

Good luck-and please provide feedback if this helps!

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1 Answer

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 philips 50p8341 beeps then flashes the red led 4 times


4 Blinks means that an incorrect voltage had been detected on the +5V circuit coming from PSU to digital control board.
The PSU must be tested and eventually repaired or replaced.

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