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Is it the motherboard?

This is a discussion on Is it the motherboard? within the Motherboards, Bios|UEFI & CPU forums, part of the Tech Support Forum category. My computer was fine until i shut it down over the weekend & since then it won't come back on,


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Old 12-18-2008, 05:16 PM   #1
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Cry

My computer was fine until i shut it down over the weekend & since then it won't come back on, the lights, fans & all that work but the system just won't boot up. I got it to come on once for a couple of days but it froze, now i'm back at square one again.. could this be the motherboard or power supply?
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Old 12-18-2008, 06:35 PM   #2
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It could be either but first unplug all external devices (except keyboard mouse monitor), clear the cmos, if still no go remove all cards except video and give it a try.
If it still has no video remove the drives and have only 1 stick of ram installed.
Post your full system specs
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Old 12-18-2008, 07:40 PM   #3
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what is the cmos?

it's an eMachine T6420
Windows XP
AMD Athlon 64 Processor 3400+
2.2GHz 1600MHz fsb
512 L2 Cache
200gb Hard Drive
1024mb DDR SDRAM Dual Channel

idk if thats the right information but it's what i know..
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Old 12-18-2008, 07:44 PM   #4
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in the device manager uninstall the video card
reboot tapping f8 and choose vga mode
when windows finishes rebooting
disable a/virus
install your drivers
reboot the computercmos reset
turn the computer off
remove the power lead from the back
take the side off
remove the cmos battery
move the cmos jumper from pins 1 and 2 to pin 2 and 3 and the back to pins 1 and 2
reinsert the battery
put the side on
replug in the power lead
boot the computer

there can be 2 solder points you touch with a screwdriver
2 pins you touch with a screwdriver or use a jumper
a cmos clear switch or button
there will be a diagram and instructions in your manual

with an emachine the first suspect is the power supply
what does the bios list the 12v line voltage as



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Old 12-18-2008, 07:56 PM   #5
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where is the cmos jumper & pins 1 2 3 & 4?
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Old 12-18-2008, 08:00 PM   #6
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Usually next to the battery, you could also remove the battery for 5 minutes with the machine unpluged to clear the cmos
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Old 12-18-2008, 08:03 PM   #7
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does the battery you're talking about look like a big wach battery?
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Old 12-19-2008, 01:32 AM   #8
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Quote:
Originally Posted by way.spacedout View Post
does the battery you're talking about look like a big wach battery?
Yeah, that's the one.

Do you happen to have another computer around you could test the PSU on? eMachines tend to have problems with both their mobos and power supplies, so if you could test one it'd narrow it down to the other.
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Old 12-26-2008, 01:53 PM   #9
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ohh, i removed that battery when it was unplugged for a bit then retried it but it didn't work. i don't have any other computers to test it on, so i'll probably just pay to have it looked at, i'm scared that i'll make it worse lol..
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