Question about Compaq Evo D500 PC Desktop

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I bought a 2nd hand compaq evo D500 desktop whose power supply was dead.I kept it unused for 1.5 years.Now I have bought another power supply which is working fine BUT nothing is diplaying on the monitor.The lights on the motherboard are working.The Power & the Cd Rom lights are working.HDD Led is not responding when switched on.On the keyboard the num lock light is just bipping continuosly and it seems the other keys on the K/Board are not functioning.What could be the cause of this monitor display failure and how do i solve it.It is a P4 windows XP O/S desktop.

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  • 188 Answers

Check that you hooked up all the power supply connections. Try a new motherboard battery as the old one may be dead and the bios is not working. You are evidently not getting a post beep signaling that the cpu, ram, video are good.

Posted on Nov 27, 2013


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SOURCE: PC is frozen when I press WIN-key

If in Win XP, and dos program running, try ALT-BREAK. I use a DOS/XP duel boot system for development. XP restricts dos programs from operating coms properly. If a dos program (made to operate in dos) tries to access coms, it will hang and lock the system down. Reboot is the only recovery that will work.

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Posted on Feb 24, 2008

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SOURCE: my compaq presario 5000 (5WV286)will not exit

it looks like port on your PC where monitor connected gone bad, now you can double check this connecting your PC to another spare monitor not the one which is already working, even one more thing sometimes it does happen that cable you are using with your PC might not be passing good enough signal to the port , I know same monitor works on other machine but we want to find out actual port back on your PC so its worth second option to try another cable.

but if another monitor or cable swap doesn't work then that means display connection port gone bad, you might need to consider changing graphics card.

update me if any problem or if you have more questions regarding this.




Posted on Mar 27, 2009

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SOURCE: Compaq s5000nx does not boot up. Blank screen. No

Here and here are a couple of links from HP that may help. And here's a great article for troubleshooting startup problems in general. Also helpful may be links at this site.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

Posted on Jun 11, 2009

  • 5660 Answers

SOURCE: Compaq EVO 510 2.4GZ Motherboard Question

Motherboard was tested before shipping? Good.
Want you to know I wasn't trying to be a smart aleck with my statement.

I was trying to find out if the motherboard was removed from a computer, and the state of the motherboard was not known.

When a problem is stated on here, you never know the expertise of the person you're dealing with, most of the time.

I see I am dealing with someone who has intelligence, and knows their way around a computer. Good!

About Anti-Static Guidelines;
Your body carries Static electricity. Static will fry out computer hardware components. You may not even see it, or feel it.

It is suggested to work on a table, and if the table is sitting on a carpeted floor, to refrain from swinging your feet back, and forth.

After unplugging the computer from power, and opening the computer case, Touch the metal frame.

This will relieve Static from your body. If you get up for any reason, leave, then return, Touch the metal frame again.
Touch the metal frame before you handle any computer hardware parts, and especially the Processor.

(Refrain from touching the Processor's pins on bottom. Handle the Processor by the case. Refrain from touching the gold plated contact pins, on the bottom of a ram stick. Anywhere else is fine. The body of the ram stick is coated with a see-through plastic)

Minimal wires connected?
1) Meaning only the Power On wires to the Front Panel header, on the motherboard? Excellent.

2) 20/24-pin ATX Power cable to motherboard? Excellent.

3) 4-pin ATX power cable to motherboard? Excellent.
(The 4-pin ATX square shaped connector. This power cable is the power for a Pentium 4 processor. Must be hooked up)

No harddrive power cable, nor interface cable attached
No CD/DVD drive/s power cable, nor interface cable attached.
No USB front panel cables attached.

Computer case fans, and processor fan hooked to power? Okay.

What Wattage does you Pentium 4 use?
Only thing that Compaq Support lists, is that one of the processor options is an Intel Pentium 4 processor, that operates at a maximum frequency rate of 2.4GigaHertz.

Doesn't state what architecture, nor Core, the processor is based upon.
It IS a Pentium 4, that uses a Socket 478 processor socket.

I know this, because a Pentium 4 that operates at 2.4GHz, only uses a Socket 478.

There were Five different models, of the Pentium 4 2.4GHz processor made.
Three of them were brought out in 2002, the year your computer came out.
They use the Northwood Core, and the 130NanoMeter architecture. (130nm)

All three used a maximum of 59.8 Watts

How much does the motherboard use, is the question about asking how much Onboard, (Integrated), graphics uses for power.
Around 50 Watts.
Add Ram Memory, about 80 Watts.
Total without harddrive about 140 Watts.

Ram Memory installed, and Processor. You should get the BIOS POST screen. You may have to restart the computer up to 4 times.

If you are using a harddrive from another computer, this won't work.
The Windows operating system, has already logged the hardware from the computer it was previously installed in.

The DDR Sdram ram memory at 333MHz, has to be,
1) Non-ECC
2) Unbuffered
3) 2.5 Volt
4) Cas Latency of 2.5, or 3. (CL 2.5, or CL3. Ram Timings)

Maximum Amount for EACH ram slot is 1GB
Maximum TOTAL Amount is 2GB for the computer.
Always install the largest ram amount in Slot 1.
(DIMM 1 on motherboard)

The Processor 'Sees' Slot 1 first.

You are absolutely sure those power supply's are good?
Do you have any bad Electrolytic Capacitors on the motherboard?
Especially the one's that surround the Processor?

Capacitors that are close to the Processor are Voltage Regulators for the Processor.
The Processor must have a Clean, Steady, supply of Voltage.
A Processor has a VERY narrow tolerance range.

Information on Visual Signs of Bad Capacitors,

Posted on Jan 09, 2010

Testimonial: "I actually ended up using another motherboard..I tried everything i could think of and then some from this post no luck..."

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SOURCE: my Compaq evo d500 has a problem of starting up.

try to examine you motherboard. is there a capacitors that blow up? if there is, those capacitors are the problem. you have to take that out or let a technician do it. then change it with the same specifications.

Posted on Jun 04, 2010

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My Compaq evo d500 has a problem of starting up. When i try to press the start button, it doesn't switch on, though i just bought another power supply two months ago, after the one i bought it with broke...

try to examine you motherboard. is there a capacitors that blow up? if there is, those capacitors are the problem. you have to take that out or let a technician do it. then change it with the same specifications.

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When I press the power switch, the green light comes on for about 2 seconds then it starts flashing red.

I'm afraid you need a new Power Supplies Unit. Just try an old trick first. Remove power cord from the back of PC. Press power button and keep it pressed for good 30 seconds. Then reconnect power cord and try to start as normal. If this don't work I'm afraid your PSU is dead. Good Luck

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My d500 compaq evo is receiving power but it is not powering up. The led lights are on. What seems to be the problem

try to replace the power supply. maybe its not giving enough power to boost up the computer.

Mar 02, 2010 | Compaq Evo D500 PC Desktop

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look on ebay for used compaq power supplies.

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Compaq evo d500 does not turn back on

If its powering on, but the screen isnt turning on and the computer starts beeping, try replacing the ram.

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