PC won't bootup after replacing PSU!!!

PrinceKee

Member
Feb 16, 2006
69
0
0
I just replaced a dead PSU and plugged in my DVD, CD, HDD drives along with the mobo but my system won't start. Nothing shows up on the monitor but the led light on the mobo does come on and the CPU fan spins. Also even though the led on the DVD drive comes on it won't eject. Anyone have any suggestions???
 

ch33zw1z

Lifer
Nov 4, 2004
38,966
19,604
146
Reseat the RAM, VGA, and power connections (did you forget to plug in VGA power?), unplug anything you don't need to complete POST.
 

PrinceKee

Member
Feb 16, 2006
69
0
0
I'm kind of thinking that the power supply took out the mobo with it. Hopefully it didn't take the RAM out with it or anything else. So all I need to post is the RAM and VGA right?
 

ch33zw1z

Lifer
Nov 4, 2004
38,966
19,604
146
Originally posted by: PrinceKee
I'm kind of thinking that the power supply took out the mobo with it. Hopefully it didn't take the RAM out with it or anything else. So all I need to post is the RAM and VGA right?

To complete POST: CPU, RAM, VGA, and power(ensure all your required power cables are plugged in and seated properly). Nothing else is required for a good POST. If you receive any beep codes, other than a single beep at the end of POST which means a-ok, record them because they will tell you where the problem resides.

If you cannot complete POST with those parts installed. Pulling a critical device to try and recover the board is a good step. IE, pull all the RAM and see if the mobo returns POST error. If no error at all, try the same with the VGA. If that doesn't return POST errors, try clearing the CMOS and try again.

Post results, also post system specs please!
 

PrinceKee

Member
Feb 16, 2006
69
0
0
Just tried to post with just my graphics card, RAM, and CPU and still nothing. The power led and HDD indicator stays lit along with on of my dvd drives. No beeps or anything not even any sounds from my floppy and HDD's. tried it with one stick of RAM in and same thing. BTW I tried clearing the CMOS last night and nothing...

Sempron 3100+
512MB DDR2 2700 RAM
Ati Radeon 128MB 9200 SE
DVDRW
CDRW
80gb Western Digitial HDD
40gb Western Digital HDD
3.5 Floppy
 

Ausm

Lifer
Oct 9, 1999
25,213
14
81
Did you forget to plug in the Auxillary 4 pin power plug on the mobo?

Ausm
 

ch33zw1z

Lifer
Nov 4, 2004
38,966
19,604
146
Originally posted by: PrinceKee
Just tried to post with just my graphics card, RAM, and CPU and still nothing. The power led and HDD indicator stays lit along with on of my dvd drives. No beeps or anything not even any sounds from my floppy and HDD's. tried it with one stick of RAM in and same thing. BTW I tried clearing the CMOS last night and nothing...

Sempron 3100+
512MB DDR2 2700 RAM
Ati Radeon 128MB 9200 SE
DVDRW
CDRW
80gb Western Digitial HDD
40gb Western Digital HDD
3.5 Floppy


So you are leaving a DVD drive plugged in also? I'm confused, are you trying all this with just CPU/RAM/VGA? or are you leaving devices like hdd, cd/dvd rom, floppy installed? What happens when you pull out the RAM, or hte VGA? any POST errors?
 

PrinceKee

Member
Feb 16, 2006
69
0
0
No I'm not leaving the dvd drive plugged in but have tried with it and other peripherals . I tried with just ram/cpu/vga. I got no post errors when I pulled out the ram or graphics card. I remembered the 12V 4 pin power plug for the mobo...
 

ch33zw1z

Lifer
Nov 4, 2004
38,966
19,604
146
Originally posted by: PrinceKee
No I'm not leaving the dvd drive plugged in but have tried with it and other peripherals . I tried with just ram/cpu/vga. I got no post errors when I pulled out the ram or graphics card. I remembered the 12V 4 pin power plug for the mobo...

No POST while RAM or VGA is missing indicates an issue with mobo or PSU.