Newbie is lost

E

eztrog88

New Member
I've picked up a couple of parts computers for free to fix my emachine.

Bunch of random parts, but all compatible

the problem, I have power going to the mobo (I know via a green indicator led), everything is hooked up correctly but I can't get the computer to power up. Replaced the switch still can't get it working...

any thoughts?
 
i just fixed my friends comp that had the same problem. First way. take the small battery on the motherboard and count for 30 sec. put it back in. And it should boot. If not try to reset th cmos. there should be a jumper by the battery. connect the two terminals and press the power. take the jumper out and try to boot.
 
really a newbie here, any chance you could point me in the right direction of that battery? what will it look like?

Also, how would I go about resetting the cmos? (it's a dh458hv board if that makes a difference)
 
it is one of those small round silver colored batteries, like in a watch. by removing that battery you are taking the first step in resetting the CMOS. the next step would be to see if the motherboard has CMOS clearing jumpers (check the manual or look online). if there are no jumpers, remove the battery, unplug the computer, and hold the power button for 10 seconds. most motherboards will have jumpers to clear the CMOS though.
 
mate, you dont sound like you have done enough research here, what old mobo did you take out and what new one did you put in. Dell power supplies have a tendancy to not be directly compatible with non dell boards.
Mobo lights dont mean all is well and good. What board did you buy? how did you know how to connect up the headers (including the power switch)
Have you connected the ATX12v.
 
he didnt say if he replaced the mobo or not, he just said 'random parts'

could you tell us what parts you changed?
 
I appreciate all the info...

I didn't do any research, I had an emachines with an L7VMM2 board and stock psu that were both dead. The comp was going in the trash when I was offered 2 parts computers for free. 1 is another emachines unknown Intel board. The other is an unknown make with an Intel D845HV board.

I'm using the D845HV board with whatever processor it has in it (should be a Pentium 4), in the original emachine case with the atx12v from the parts emachines.

The D845HV board has the wrong battery in it, I can pick a new one up tomorrow, is there any way around this for tonight? Any other thoughts on what might be wrong? I'm not positive the connectors from the front panel are on right, there are 2 rows of prongs marked 'frontpanel' on the board, but I'm not quite sure how to connect them. Tried a number of combinations, no luck.
 
Ok, correct battery installed, tried resetting CMOS.. nothing. I couldn't find any info on jumpers for the cmos tried resetting via power switch like cleric suggested and there's no change. :confused:
 
it is very possible that you have the wiring messed up for the power button. there is a way to short circuit it with a screw driver, but its risky.
 
Cleric7x9 said:
it is very possible that you have the wiring messed up for the power button. there is a way to short circuit it with a screw driver, but its risky.
Click to expand...

found that info 2 minutes before you posted, the power button connection is now definitely correct, still nothing. I know the psu is good, but I can't seem to get anything going here. No fans, no hdd...
 
bluedishwasher said:
got the motherboard power connector plugged in? are you sure everything that needs power is hooked up?
Click to expand...

motherboard power (in bother location, the long connection as well as a 4pin connector), also plugged: DVD-Rom (as master), CD-RW (slave), 3.5" Floppy, HDD, CPU fan, rear case fan, front USB, video card
 
RAM shouldnt have anything to do with it not turning on. It should turn on with beeps. If the mobo is fried you wont get any response.
 
I'm at a lost, tried everything suggested.. it would really suck if I've got 3 dead mobo's but I suppose it's possible. pics in a minutes, maybe something will jump out at you guys that I missed.

The only battery I have is from my original dead mobo, could the battery be fried causing it not to turn on?
 
100_0769.jpg


100_0770.jpg

ATX12V to mobo

100_0775.jpg

Front USB on left
Front Panel on right

100_0776.jpg


100_0777.jpg

2nd ATX12V to mobo connection on bottom
Case fan on top

100_0779.jpg

128mb PC-133 RAM

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Mobo LED with psu plugged in and switched on
 
I would short the 2 pins. The switch may be bad... Just touch the two metal pins together. I see in a picture that you have no RAM in the mobo though...
 
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