Solved No Power When press button

February 20, 2013 at 15:50:44
Specs: Windows Vista, Intel Pentium DC E2180/2GB DDR2
Problem with Acer AM1610-B1304A Intel Desktop PC - Intel Pentium Dual Core E2180, 2GB DDR2, 500GB SAT, OS: Win Vista
Power switch
Hi, pc struck by lightning, changed motherboard with same new one, psu ok but will not power up, nothing, no light no nothing. could it be power button? If so tell me how to test it and change it out. please help

wcalvinh


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✔ Best Answer
February 21, 2013 at 09:41:24
Using a power supply from another working computer is not proof that your power supply is OK. The borrowed power supply may not be powerful enough to run your system. What are the ratings for all +12V rails. This information is printed on the power supply label. List the original and both replacements. If more than one +12V rail then list all.

Open the case and look for the two pins on the motherboard that correspond to the leads from the power switch. The power switch is a momentary contact type. You can remove those two wires and simply touch the two pins with a screwdriver to start the computer.

I highly doubt the issue is with the switch. If the lightning strike was extremely damaging it could have taken out the CPU or other hardware also.

Try disconnecting ALL drives. Both power and data connections. Also unplug any non critical USB devices and the networking cable. Remove all but one stick of RAM.

Clear the CMOS on the motherboard by using the jumper marked for that purpose. Do that while the computer is unplugged.



#1
February 20, 2013 at 17:10:15
If you changed out the motherboard, then the PSU is probably NOT ok. You should still at least see a light on the motherboard indicating power is being received, even if the computer isn't turning on.

You've been helped by a 15 year old.


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#2
February 20, 2013 at 21:17:06
Yeah, if you deduced the PSU was OK simply because fans spun up and LEDs flashed when you turned it on, well, that's not enoiugh.

It could also be a dead peripheral--drives or add-on cards.

When governments outlaw guns only outlaw governments will have guns


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#3
February 21, 2013 at 06:36:04
I agree with the above. Lightning would affect the power supply BEFORE the motherboard. Could take out both but less likely to damage the board and not the power supply.

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Related Solutions

#4
February 21, 2013 at 08:38:01
Thanks for reply. PSU ok, I used another one from a working PC with no nothing install on M-board still nothing seem to be dead. that why i think it is the power button. How do i test the power button and if bad where do i get one
Thanks

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#5
February 21, 2013 at 09:41:24
✔ Best Answer
Using a power supply from another working computer is not proof that your power supply is OK. The borrowed power supply may not be powerful enough to run your system. What are the ratings for all +12V rails. This information is printed on the power supply label. List the original and both replacements. If more than one +12V rail then list all.

Open the case and look for the two pins on the motherboard that correspond to the leads from the power switch. The power switch is a momentary contact type. You can remove those two wires and simply touch the two pins with a screwdriver to start the computer.

I highly doubt the issue is with the switch. If the lightning strike was extremely damaging it could have taken out the CPU or other hardware also.

Try disconnecting ALL drives. Both power and data connections. Also unplug any non critical USB devices and the networking cable. Remove all but one stick of RAM.

Clear the CMOS on the motherboard by using the jumper marked for that purpose. Do that while the computer is unplugged.


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#6
February 21, 2013 at 11:15:12
PSU ratings for Original +12V = 15A max, -12V = 0.5A max. 250 Watts Max
PSU ratings for Replacement +12V = 18A max, -12V = 1.0A max. 350 Watts Max


Everything is disconnecting ALL drives. Both power and data connections. Non critical USB devices and the networking cable. All RAM.

Cleared the CMOS on the motherboard. Still nothing no fans, no lights, no nothing seem as if dead. Maybe it is the CPU, in that case I just buy another PC and send Motherboard back. Thanks for all help.


Update - - Just tried again with everything disconnected and cleared CMOS it came on all is fine it was the front USB cable / hardware
Thank alot guys you are the best :)


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#7
February 21, 2013 at 11:34:51
All that is needed to post is PSU, MB with HS/fan, CPU, 1 stick RAM, graphics, keyboard, monitor.

Try disconnecting all case to board wiring, any USB headers to board, drives, extra RAM, etc. Also any external hardware except keyboard.

Be sure the CPU cooler is connected to the header marked CPU fan.

Start the computer by momentarily touching both power switch pins with a screwdriver.

If you can't post with that configuration then the issue is PSU, board, CPU or RAM.

If you have multiple sticks of RAM then try them one by one.

Also try the board outside the case to verify there is no board to case shorting.


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#8
February 21, 2013 at 12:14:42
Update - - Just tried again with everything disconnected and cleared CMOS it came on After reconnecting everything one at a time by connecting and restarting, all is fine it was the front USB cable / hardware
Thank alot guys you are the best :)

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