Question about HP Pavilion Elite M9400F PC Desktop
I can't say that this will help you but at least you are trying something.Disconnect the power cord from the unit wait 10 seconds and then plug back in. Check and make sure that you are on the right power setting for your computer by looking at the red tab on the back and make sure it is on the right setting ,this is your voltage selector switch.If none of this works make sure that you have power coming from the wall or outlet that you are plugged into If all of this fails you may have to have a new power supple box for your comp. Also check all of your power supply cords, I have seen them give a power problem before. I hope that this will help you,if not give me some more info on what all you did and what your system is still doing... Good Luck..
Posted on Jan 13, 2013
This will generally be caused by one of two things.
Start by repalcing the power supply, that is usually the problem.
Posted on Jan 13, 2013
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Posted on Jan 02, 2017
SOURCE: HP a350n not powering up.
unplug power and open computer and pull the small battery and wait 30 sec and replace
plug in everything and reboot
may have to re-enter cmos utility
Posted on Aug 25, 2008
OK, this can be a hard thing to fix. Most of the time, the power supply is the first thing to go on a PC. However, when you stated that the motherboards LED came on after you unpluged the PS from the motherboard, it leads me to believe that the motherboard is the issue but the power supply might be outputting higher voltages and the motherboard might be shutting down. Since the power supply is cheaper then most motherboards, I would recommend getting a new one. Check ebay for a new power supply. It should be about $20 with shipping. If the same thing happens, then you need a new motherboard...
Posted on May 30, 2009
Boatin4me is correct on the process of elimination. I had the same issue and it was related to a bad modem.
Posted on Jan 11, 2010
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