PC won't power on
#1
Posted 12 April 2009 - 11:19 AM
#2
Posted 12 April 2009 - 11:34 AM
By your description, the motherboard is dead.
If you connect other leads and the fans all turn on, the hd spins up, the dvd\cdrom drive lights up then the problem is mb.
If the computer still will not boot up the please remove the motherboard from the computer along with the power supply
place the motherboard on a piece of card board larger than the motherboard,
this will eliminate a short from the mobo to the case witch could be a possibility
Install the cpu with, 1 stick ram in dimm 1, power supply, video card, case switch and case speaker
Connect ps2 mouse and keyboard along with the monitor
turn power on
If the computer now boots into bios you most likely had a case short so make sure when installing the motherboard in the case that you use standoffs and they line up with the mounting holes in the motherboard and none of the standoffs touch anything else on the underside of the board.
Edited by rshaffer61, 12 April 2009 - 11:35 AM.
#3
Posted 13 April 2009 - 12:50 PM
Edited by boscru6469, 13 April 2009 - 12:50 PM.
#4
Posted 13 April 2009 - 01:27 PM
* keyboard
* mouse
* video output
* 20+4 powercable
* 4/8 pin 12v wire both coming from the powersupply,
* Cpu fan wire
* power and reset button to the case
*case speaker
Now you should have NOTHING connected to the motherboard except what was listed above.
The goal here is just to test the mobo:
If the computer still will not boot up the please remove the motherboard from the computer along with the power supply
place the motherboard on a piece of card board larger than the motherboard,
this will eliminate a short from the mobo to the case witch could be a possibility
Install the cpu with, 1 stick ram in dimm 1, power supply, video card, case switch and case speaker
Connect ps2 mouse and keyboard along with the monitor
Repeat the above and power on
If the computer now boots into bios you most likely had a case short so make sure when installing the motherboard in the case that you use standoffs and they line up with the mounting holes in the motherboard and none of the standoffs touch anything else on the underside of the board.
#5
Posted 13 April 2009 - 02:00 PM
#6
Posted 13 April 2009 - 02:06 PM
#7
Posted 13 April 2009 - 03:51 PM
I have an HP Media Center m1170n. It will not power on. When I press the button on the front I don't get anything at all. I thought it may be the power supply and tried a new one, I still have the problem. I disconnected all addon cards, HD cables and power cables from the motherboard. Plugged in the 24 pin cable to the board and turned the PC on and the fan on the PSU started. I then plugged in the 12v connector and turned on the PC and the fan on the PSU did not start. Does this mean my board is dead, CPU is dead or both?
Had the exact same problem last week with a 12month old HP Media Center m7000, woking fine then press the power button the next day and nothing. The LED light on the MB still comes on.
Luckly it was just within the warranty period so it has gone back, but reading on with interest because Id like to know what it might have been & if its a common fault/ failure.
#8
Posted 20 April 2009 - 10:16 AM
What would happen if I tried the same thing with the cpu removed?
#9
Posted 20 April 2009 - 10:38 AM
When you do the first test are you getting video then or still nothing?
#10
Posted 20 April 2009 - 12:22 PM
#11
Posted 20 April 2009 - 12:40 PM
#12
Posted 20 April 2009 - 01:42 PM
#13
Posted 20 April 2009 - 02:31 PM
#14
Posted 20 April 2009 - 02:50 PM
#15
Posted 20 April 2009 - 03:41 PM
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