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Old 07-01-2011, 04:53 PM   #1
theKbStockpiler
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Old Emachines does nothing except when the power button is pressed.


A friend of mine has an old emachines with XP on it and at first it would complain it had to test the disk and turn off in less then a minute. Now it won't do anything except run the power supply and cpu fans while the start button is pressed. I checked for power on the blue , purple ,red and orange wires while 14 and 15 were jumped on the power supply. There are no lEDs on the board and no beeps. I disconnected all the peripherals also. Sorry it's a windows machine but hardware is hardware and I have gotten some great help in this forum before.

Thanks in advance!

Last edited by theKbStockpiler; 07-01-2011 at 05:22 PM.
 
Old 07-01-2011, 04:56 PM   #2
jefro
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Windows or not it should follow a normal pc boot. Part of that is testing. Look for keyboard lights or cd lights or floppy lights. If none light then it is either not starting post or not finishing.
 
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Old 07-01-2011, 05:10 PM   #3
theKbStockpiler
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No lights no nothing

I imagine that the board or bios is shot then? There is only response when the power button is pressed and this response is only the fans. Take your finger off the button and the fans turn off.

Last edited by theKbStockpiler; 07-01-2011 at 05:14 PM.
 
Old 07-02-2011, 05:06 AM   #4
business_kid
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The lines you really need power on are the red, & orange. Also vsb (forget the colour).

Try a cd boot before you give up on it. I would pull the hard disk for this. It was bellyaching about the hard disk, wasn't it? You can have a short blowing the psu, or shutting it down.
 
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Old 07-02-2011, 03:17 PM   #5
theKbStockpiler
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It won't even Post.

I'm pretty sure if there is no hard drive connected bios will still run and I have tried to power it up with the hard drive disconnected.
 
Old 07-02-2011, 05:17 PM   #6
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If you press power on and even hold it does any other normal post signs show up? The lack of a hold on the power supply makes me begin to suspect the psu. Could be the MB not holding also.
 
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Old 07-02-2011, 08:50 PM   #7
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Quote:
at first it would complain it had to test the disk and turn off in less then a minute. Now it won't do anything except run the power supply and cpu fans while the start button is pressed.
Complaining about having to test the hard disk is probably because the power failed while the disk was busy. Get the power fixed and hopefully it'll scan and rebuild clean.
As theKbStockpiler mentions, disconnect power to all drives, both hard and CD, just leave the motherboard plugged in. Does it power up in this state? If so, do it again plugging one drive in at a time till it fails. Last item plugged in is duff. You can also try removing all your PCI cards and adding one at a time. If you get beep codes, maybe all is not lost.

Most PSUs, if they have too much current pulled from them due to a short or low resistance path, will crowbar which means that they shut down to protect themselves from burning out. Then again, some just, er... burn out.

If the power and CPU fans run you've got 12 volts. You said you measured the rest...? So what did you get? Checking a drive molex connector you should get 12V for the motor and 5V for the electronics?

Can you beg, borrow or steal a PSU to jack into your motherboard to test it with? (Again, no drives first!)
Let us know how you get on.

Play Bonny!
 
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Old 07-02-2011, 09:54 PM   #8
theKbStockpiler
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I think the controller is bad

I had most of a whole computer laying around in parts except for a power supply and hard drive so I threw it together so they had something to use till they can find a close-out on one and BIOS could not detect the hard drive and needless to say my Ubunto live disk would not install either.No hard drive no installation.Go figure. The Power supply works fine with the Ubuntu live disk. Now it looks like the controller on the hard drive is (blanked)! BIOS should still have worked on this board though so I guess the hard-drive/controller burned out the board or the board burned out the hard-drive/controller.

Last edited by theKbStockpiler; 07-02-2011 at 10:08 PM.
 
Old 07-03-2011, 03:15 AM   #9
EDDY1
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Check the cable, I've had cables go bad either that or broken pin on hard drive.
 
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Old 07-03-2011, 06:29 AM   #10
TobiSGD
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I have seen a behavior like that sometimes when a faulty component somehow managed to "hang" the BIOS. Reset the BIOS with the appropriate jumper, you should find that in the mainboard's manual. Mostly they are labeled CLRCMOS, CLRRTC or something similar.
 
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Old 07-03-2011, 12:09 PM   #11
kilgoretrout
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Since you are dealing with an emachines box, I would definitely take a long hard look at the power supply. Emachines are notorious for using cheap substandard power supplies, usually Bestec, that provide unreliable power which frequently spikes out of spec and damages components on the motherboard. When an emachines power supply goes, it almost invariably takes out the motherboard and other components with it. This is common knowledge among those who do PC repair. I wouldn't attach an emachines psu to any hardware I valued.
 
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Old 07-03-2011, 02:05 PM   #12
EDDY1
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@KBStockpiler
I for got to include that I have an emachine T-1221 anyway, I don't use it a lot so it's not always plugged in.
But when I start it for the first time after being unplugged it almost never boots. I always have to disconnect everything & recnnect for it to do anything. So try disconnecting everything & reconnecting.
 
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