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Repairing a power supply unit or monitor - PC Desktops

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Power supply not work ac in put is ok

Posted on Sep 16, 2008

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My aspire ast180-ea 350b won't power on


This sounds as though the power supply unit within the desktop has failed.

You should be able to buy a standard replacement from your local computer repair shop.

Dec 10, 2013 | Acer Aspire PC Desktops

5 Answers

I have an X2Gen MW22U monitor. While using, I heard a heavy static sound, then the monitor went black. I can't get it to work now. I disconnected the wires and then reconnected. Restarted the computer....


You should powercycle the Monitor.
Unplug the printer from the power and press and hold the power button on the monitor for 30 seconds. (It wont show anything)
Try the same again than.

Sep 23, 2008 | PC Desktops

2 Answers

I CAN SEE THE CPU FAN RUNNING, but i cannot see anything on my monitor,i mean my monitor is still in sleep mode


1) If the monitor has a removable monitor cable, and you have a Known to be good one to use for a test unit, try it. If it isn't removable, try another Known to be good working monitor.

2) If the monitor cable, and the monitor proves to be good, the next thing to suspect would be bad graphics.
Bad Integrated graphics on the motherboard, or if a graphics card is used, a bad graphics card.

3) I suspect it is a bad Power Supply. An issue that comes up so much, that I would skip 1 and 2 above, and check the Power Supply.

A) ALL of the LED lights, mumba_mwaba, use less than 1 Watt of power when in use.

B) EACH fan uses 2 to 3 Watts.

C) A typical Processor can use 51 to 125 Watts. Depends on what Processor it is.
(Older processors such as a Pentium II for example use less)

Enough power to light LED lights, and spin fans, (Or spin a few times and stop), but Not enough power to turn the Processor on.

This is why you may see LED lights lit, and fans spinning, but the computer isn't working.
The computer isn't sending a video signal to the monitor.
No Signal.

Do you have a KNOWN to be good, compatible Power Supply to use for a test unit?
May sound far fetched, but perhaps there is someone who has upgraded to a better computer, and has a computer they're not using, and you could borrow the Power Supply for a test unit.

Oct 29, 2010 | PC Desktops

2 Answers

Its not reading the monitor


1. check monitor power is on.
2. check signal cable is connected.
3. Check cable for damaged/bent pins.
4. Check that correct interface is selected on the monitor. (VGA, HDMI, DVI etc...)
5. If you have more that one graphics card installed in your system make sure that you try all connectors on all cards as the integrated graphics might be disabled in the bios.
6. If your connecting your monitor to the CPU by a cabe other than a VGA cabe then try using a standard VGA (15 pin cable port is usually blue).
7. try another monitor.
8. Try a bios reset, usually jumpered inside the CPU casing, just make sure that opening it will not void any warranties.

If your still stuck let me know.

Jun 20, 2010 | Sony VAIO VGC-RA840G PC Desktop

2 Answers

Computer monitor don't work at all.


So basically your monitor's power supply system died.
Nothing much a non-technician could do about it.
Get it repaired, if under warranty, get a replacement before the coverage duration expires.

Jun 07, 2010 | PC Desktops

2 Answers

No image in monitor


isolate it first. there are 3 steps: step 1: isolate the monitor. use other monitor. if still no display, step 2: replace video card. if still no display, step 3: replace memory module.

Jun 02, 2010 | eMachines C6535 PC Desktop

3 Answers

My HP Pavilion computer unit will not turn on. Have tried unplugging, replugging; all the cords/plugs look good. Unit is quite old (at least 10 years). Monitor still seems to work. Is it dead?


Could simply be your power supply. Please check that the power cord is connected to the computer and that the power supply switch (located in the back next to where the power cord plugs into the computer) is in the on position( I = on 0= off). IF the power cord is plugged into a working outlet and the power supply is on then it can only be one of two things. You have a bad power supply( easy fix that will only cost you about $50 or less) or your motherboard is bad. If you took this into a shop for repair they would pull out the power supply and replace it with a know working one. If that does not fix the problem then they would tell you your motherboard is bad. Power supplies are fairly easy to replace and, for your unit, very cheap, about $15 from newegg.

Jul 20, 2009 | HP Hewlett Packard Pavilion Slimline...

1 Answer

Monitor will not come on. Power light flashes


Are there any lights on your PC? If not then you are going to have replace you power unit. I would not attempt to repair because a)they are cheap to replace and b)they contain a lethal charge.

Apr 14, 2009 | PC Desktops

4 Answers

Black screen on monitor when pc is switched on


Does anything come up on the monitor or is it just black always

Oct 31, 2008 | PC Desktops

1 Answer

Screen problem with HP DV 9000


I think Your computer C.P.U. power supply unit is not working properly. because these type of problem occur when Power Supply Unit is not working properly.........

So Don't afraid at all just change your c.p.u. power supply unit with new one (it is not costly at all).

Mar 19, 2008 | PC Desktops

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