Question about HP Compaq dc7100 PC Desktop

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I can not start HP compaq dc 7100 CMT. starting four beep

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Hello there, this means the machine has an internal hardware failure. 4 beeps almost always indicates the memory (RAM) has gone bad in the machine. If you are unsure of how to put new ram in the machine yourself you are going to need to contact a local service person to do this, it should not be too expensive. If you need help locating someone in your area please respond to this answer with your zip code and I will find someone for you.

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Thanks
Tim

Posted on Oct 12, 2010

  • mkrevlin Feb 15, 2011

    Manual says 4 beeps is Power supply overload (Crowbar). Not sure what Crowbar is.

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2 Answers

5 beeps dc 7800 ctm fix


try these
http://h30499.www3.hp.com/t5/Business-PCs-Compaq-Elite-Pro/hp-dc7800-5-beeps-problem/td-p/1142014#.VJYGUvXpAg


HP Guide to beep codes:
http://h10025.www1.hp.com/ewfrf/wc/document?cc=uk&lc=en&docname=bph07107
(see your machine spevcs for which BIOS you have if you don't know)

http://h30499.www3.hp.com/t5/Business-PCs-Compaq-Elite-Pro/Boot-problems-with-dc7800-CMT/td-p/1080736#.VJYHL_XpAg

and many more generated by searching the internet for "5 beeps hp dc 7800"

The second reference I posted is possibly the place to start
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Beeps 5 times on start up


Try this, turn off PC. Remove memory sticks. Power pc on without sticks. Power PC off. reinsert memory sticks. power back on.

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Hp dc 7100 cmt models sound drivers not available on hp site


SoundMAX Integrated Digital Audio is the driver for your model.
You can check and download the drivers from this link

Regards

Jun 03, 2012 | HP Computers & Internet

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Hp compaq dc 7100 , my problem is that as i start my pc than 4 beep with time interval 0.2 sec with led than after 0.5 sec it start again , remain continously


Are they Long Beeps? Does the RED led light on the front show up?
If there is no RED led light blinking, then the problem is your RAM.
If there IS a RED led Light showing up, then the problem is your Power Supply.

Mar 27, 2011 | HP Compaq dc7100 PC Desktop

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I want to install a new sound card


Goto your device manager

-start; control panel; system; click the hardware tab; device manager

Expand sound,video, audio controllers

Click update drivers on whichever ones you downloaded recently.

Also in the control panel, goto sounds and audio devices.

Set your new soundcard to default in your hardware tab, and change your audio setup if needed.

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normal white wire....?
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Mar 31, 2009 | HP Compaq dc7100 PC Desktop

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Problem


DC-DC board or motherboard. does it boot up from a charged battery (like from another laptop)?

if it works on battery power then i'd look to replace the DC-DC board (its a little board inside the laptop that holds the power jack and a few power-related components)

if it continues to beep even when only on a battery then you should look into a replacement motherboard. and if you have a Compaq V2000, i'd look into a "parts/repair" laptop from eBay or something because that will cost less then just a motherboard.

also the DC-DC board may be built into the motherboard. in that case there is none and the motherboard is the thing you want to replace.

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do you have the RAM chips installed in the right socket, and the right way?

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