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Author Topic: I need help with a asus motherboard that wont power on!!! P4S800  (Read 2206 times)

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sirgilmour

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The mb is asus P4S800 rev.2.01
The pc was working fine and all i did was transfer the mb and power supply into another pc enclosure. It would now power on and after many attempts i put it in the old box with no more results.
I tried clearing the cmos by moving the jumper from 1-2 to 2-3 and back, removing the battery, tried different power supplys, deplugging everything but the 20 pin power supply port and the 4 pin that controls de fans plus the 3 pin fan that is above the heat sink over the processor. All capacitators look fine.
I have nothing but a green light that shows the psu in on.
Can you help me?

patio

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Re: I need help with a asus motherboard that wont power on!!! P4S800
« Reply #1 on: January 18, 2016, 06:40:36 PM »
Does it work outside of any case ? ?
Have you tried a known good PSU ? ?
" Anyone who goes to a psychiatrist should have his head examined. "

patio

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Re: I need help with a asus motherboard that wont power on!!! P4S800
« Reply #2 on: January 18, 2016, 06:46:53 PM »
For a breadboard test outside the case:
PSU....hook up all connectors
MBoard
1 stik of RAM
Mouse
Keyboard
Monitor.

Let us know...
And try a 3rd PSU just in case...
" Anyone who goes to a psychiatrist should have his head examined. "

DaveLembke



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Re: I need help with a asus motherboard that wont power on!!! P4S800
« Reply #3 on: January 18, 2016, 07:33:56 PM »
Is there a chance that you over tightened any of the mounting screws and damaged the motherboard or jabbed a trace with a tool like a screw driver that pops off a screw head and digs into the PCB? Any chance that the motherboard shorted out at all on anything in the new case such as an improperly placed stand off that came to rest on legs of components on the bottom side? Are you sure your front panel connection is correct that you have the power switch, reset, HD LED and Power LED proper and no jumpers popped off thru the process? Any static shocks through the process due to dry air and improper ESD protection to where you might have spiked a chip and killed the board?

sirgilmour

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Re: I need help with a asus motherboard that wont power on!!! P4S800
« Reply #4 on: January 19, 2016, 02:04:59 PM »
Yes i did try it outside the box and yes i did try to force the 3 screws closer to the back of the pc because on the other box the holes were a bit farther, after that not working i tried with longer screws, but this is in fact the only abnormal thing that happened during the switching, so here it is... is there a way around that?

Geek-9pm


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Re: I need help with a asus motherboard that wont power on!!! P4S800
« Reply #5 on: January 19, 2016, 06:53:53 PM »
This might help...
Google search:
https://www.google.com/search?q=+fix+a+broken+circuit+board+contact&ie=utf-8&oe=utf-8
how to fix a broken circuit board

This requires some skill using a solder iron.
-  Which requires more skill than a screwdriver.  8)

patio

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Re: I need help with a asus motherboard that wont power on!!! P4S800
« Reply #6 on: January 19, 2016, 09:41:00 PM »
Yes i did try it outside the box and yes i did try to force the 3 screws closer to the back of the pc because on the other box the holes were a bit farther, after that not working i tried with longer screws, but this is in fact the only abnormal thing that happened during the switching, so here it is... is there a way around that?

Judging by that description you likely damaged the MBoard.
" Anyone who goes to a psychiatrist should have his head examined. "

bob1286



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    Re: I need help with a asus motherboard that wont power on!!! P4S800
    « Reply #7 on: January 20, 2016, 12:07:18 PM »
    I was thinking more so ESD too the board.  I don't know, if you can easily replace componet's on boards like these cause, of how there made.  Aren't they supposed too be like dual sided or something?  Could be that your CPU isn't cooling correctly or something along that too