Question about Compaq Presario 5000 PC Desktop

1 Answer

Finding a short in PC components.

This computer wouldn't turn on. I thought it may be the power supply, so I used another one and yes, it was the power supply. However, when I tried the new PSU, I had all other peripherals disconnected except for the motherboard and video card. After the mother board loaded up fine, I thought that the problem was solved. So, I went ahead and put everything back together, but when I went to turn the thing on, it did just like before!

I checked voltage at all the connectors and both PSUs are definitely broken now. So, I've concluded that there must be a short in one of the components that I had disconnected. They are:
Modem, ethernet card, floppy drive. 2 HDD, and a DVD-RW.

I'm guessing that its one of the drives that require power, but I guess it could be one of the PCI cards too. I thought I could check the power connectors of the drives to see if they were shorted, but I don't know what Ohm reading to expect. So, I won't know if the reading is normal or not. I don't want to keep burning up PSUs just to find the short.

Does anyone know the normal resistance readings for floppy, hard disk, & optical drives on the power terminals?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert who has answered 20 questions.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

  • Expert
  • 56 Answers
Re: Finding a short in PC components.

Check this out.


Posted on Nov 18, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

When I turned my computer on most times the switch wouldn't start the computer I replaced the switch no power I'm thinking it's the power supply


Apr 04, 2013 | Gateway GT4010 (RBGT4010) PC Desktop


Tipical Computer/Laptop Post & Beep Error Codes

Error Code: Faulty Component:
1 short beep None (Normal Boot)

2 short beeps ( POST error)

Non-stop beep ( Power supply or system board)

1 long beep and 1 short beep ( System board)

1 long beep and 2 short beeps ( Video card)

1 long beep and 3 short beeps ( Memory)

3 long beeps ( Keyboard)

Non-stop short beeps ( Power supply or system board,a key on the
keyboard might also be stuck)

None ( Power supply,system board,or system
case built-in speaker)
Visual POST Error Codes:
Error # Range: Component with Error:
100-199 System Board
200-299 System Memory (RAM)
300-399 Keyboard
600-699 Floppy Drive or Floppy Controller
700-799 Math Co-processor
900-999 Parallel Port (LPT1)
1000-1099 Parallel Port (LPT2)
1100-1199 Serial Port (COM1)
1200-1299 Serial Port (COM2)

on Oct 01, 2010 | PC Desktops

1 Answer

HP Pavillion a1514n Won't Turn On

Yes even with the green light on it could still be the power supply. Have you pulled the power, opened the case, and pulled the BOIS battery? Could be the BOIS needs to be reset. You might also pull all the memory chips, turn it on and see if you get a beep code. I have had that happen in the past. Then I would replace the power supply (if you have an old one laying around use it to test, with just the MOBO plugged in). If the power supply fails, that leaves only the mother board as the issue.

Good luck, I hope one of these suggestions works for you.

Jun 29, 2012 | HP PC Desktops

1 Answer

I stopped using my acer aspire l100 when I got a laptop. I wanted to use it again so the other day I hooked it up and I got nothing. There is no light on the computer and the power will not switch on. My...

First things first if you put the wrong RAM in it would still turn on but it would beep at you. If the front switch isn't sticking I doubt it is that. You can test it by following the wires from the switch to the motherboard, disconnect the wires and use a flat screw driver to make contact between the two pins or if more pins make contact between the + and -, if it turns on then yeah it's the switch. The small 3v battery is only used to save your BIOS settings.
Lastly, yes it most likely is the power supply. I'd really just start with the power supply as it is the most common component to go out.
Comment back if you need more assistance.

Aug 25, 2011 | Acer Aspire L100 PC Desktop

2 Answers

Power is on but it just keep restarting constantly and power cannot stay on for the computer to boot.


check your power supply might have a problem, or turn on the pc and press F8 hold and start with safe mode, if the pc still restarting check your power outlet or power cord might have problem.

just leave comment ill get back to you


Mar 10, 2011 | PC Desktops

1 Answer

I have a Dell Optiplex740 , the power button on the front is flashing , when I press it..It keeps flashing , when I press it and hold it in , it turns off. But never turns my computer on, whats wrong?

If the power button is blinkinggreen system is in standby or hibernation state. If the power button isblinking amber the power supply is receiving power from the source but isunable to properly distribute it to the components. This does not mean that your power supply is necessarilybad. It simply indicates that there is a short somewhere in the system. Couldbe the result of a misconfigured or incorrectly installed system component.Could also be caused by bad motherboard, damaged USB ports, bad hard drive, badmemory etc... Sometimes it is the power supply.

Feb 20, 2011 | Dell OptiPlex 740 PC Desktop

1 Answer

My Dell Inspiron 518 will not turn on at all. How can I determine the cause?

There are two most likely problems 1. Your power supply is fried, you can always tell from odd scent that comes from its vents. Try and find a matching power supply that you can use to replace it with just to confirm it is the dead component 2. Your motherboard could have experienced a short circuit that spoiled the circuitry of the board...

Nov 21, 2010 | Dell Inspiron 518 Desktop Computer

2 Answers

Faulty power supply or MOtherboard?

Test the Power Supply first.

If you have a multimeter, use the Positive (Red) probe lead to connect to the power wire to be checked.
The Negative (Black) lead connects to ANY ground wire. (ALL Black wires are Ground wires)

Three main voltages are produced by a personal computer Power Supply.
1) Orange insulated wires are 3.3 Volt
2) Red wires are 5 Volt
3) Yellow wires are 12 Volt.
(Again, ANY Black wire is a Ground wire)

Or use an economical power supply tester.
One example,

You are making a connection from the green Soft Power On wire, to any Ground (Black) wire with that jumper wire.

Using an HP Pavilion A1330E desktop computer for an example,
we can see that the main power cable is a 24-pin ATX main power cable.

This is readily shown by looking at the motherboard,

Scroll down to the motherboard illustration, and the motherboard photo underneath the illustration.

This is the pin-out for a 24-pin ATX main power cable, and connector,

The Green wire (Pin 16) is the Soft Power On wire. The other end of the jumper can touch ANY Black ground wire.

1) ALL the lights use less than 1 Watt of power.
2) EACH fan uses 2 to 3 Watts.
3) A typical Processor can use anywhere from 51 to 125 Watts. Depends on what Processor it is.

The three Processor options for the Pavilion A1330E are, (Socket 939 style),

A) AMD Athlon 64 X2 4800+
B) AMD Athlon 64 4000+
C) AMD Sempron 3200+

The Sempron 3200+ can use up to 62 Watts
Athlon 64 X2 4800+, 110 watts, and Athlon 64 4000+ can use up to 89 Watts.

You have nothing but the motherboard plugged in, and the Power Supply takes a 'nose dive'.
Power LED turns off.

Bad Electrolytic Capacitors in the Power Supply.
Replace power supply.

What causes this?
1) Most computer failure can be attributed to the inside of the computer is dirty, as well as the Power Supply.

When the cooling components of the Power Supply, (Fan, and internal Heatsinks), are clogged, the cooling capacity drops tremendously.

Heat = Wasted Energy

The Power Supply tries to keep up with the call for power, and eventually components inside the Power Supply fail.

A can of compressed air for computers, used on a regular basis as needed could prevent this. (Observe Anti-Static precautions Before placing hands inside computer)

2) Cheap quality power supply.
Saves the computer manufacturer money.

May 22, 2010 | HP Pavilion A1330E Customizable PC...

2 Answers

Replacing the power supply on my acer pc. Liteon model No: ps 5221-06/ where to find it?


It's made by Delta for Acer. Model Number is

I know you didn't ask for this information, but I feel compelled to tell you.

I know it's hard finding the right style/shape of power supply to fit in your computer case,.

the above power supply is a cheap quality power supply. Anything in power supplies made by Delta is.
(Plus it seems to be the only thing available)

I wish you would consider buying a decent, economical, ATX computer case, and put the hardware components out of your Acer into it.

The reasoning is,
1) There will be more airflow. Airflow, is used to keep the hardware components inside the computer cool.

This increases the lifespan of the hardware components.

2) An ATX style of power supply can be used. The style that approximately 90 percent of personal computers, out there use.

You could buy a power supply for the same amount of money, that would be more Reliable, have more Power, run Quieter due to a larger fan, and has higher quality components inside.

3) Should you wish to add additional harddrives, and optical drives in the future, there will be room.

Feb 16, 2010 | PC Desktops

3 Answers

Dont power on all the time

Ok, if it shuts off itself after a short period of running it's a hardware failure. Most of the times (if that is the scenario) it is caused by a faulty power supply unit or a plugged CPU fan heatsink (yes, the little aluminumor copper-made block sitting on top of the cpu). Open up the side of your computer's tower and inspect the inside (make sure the power cord is disconnected first). Check for major chuncks of dust or lint. If so, get a couple of dust off cans and spray the whole content inside paying more attentions around the motherboard (It would be better and more efficient if you use an air compressor but watch out for the psi because to much may break some plastic components). After you do this, put the cover back in the computer and reconnect all the wire connections, including power, turn it on and try it. If the problem persist, then you may have a bad Power Supply Unit (PSU) that just heats up and cannot convert the power needed for computer components to run continously. You can get a PSU tester at Radio Shack for a few bucks. Good luck.

Jan 05, 2010 | Gateway 507GR PC Desktop

Not finding what you are looking for?
Compaq Presario 5000 PC Desktop Logo

Related Topics:

44 people viewed this question

Ask a Question

Usually answered in minutes!

Top Compaq PC Desktops Experts


Level 3 Expert

5660 Answers

Michael Thomas
Michael Thomas

Level 3 Expert

3051 Answers

Brian Sullivan
Brian Sullivan

Level 3 Expert

27725 Answers

Are you a Compaq PC Desktop Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides