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Discussion Starter · #1 ·
Hi All,

im diagnosing a PC failure, just wanted thoughts incase i have missed anything.

PC turns on, gets to the loading windows screen and then turns off. Tried diff HDD with working windows and does the same. Tried the HDD in another machine and it boots so windows is removed from the equation.

Tried a new Graphics card, no change. Removed all hardware apart from vital components does the same Tried a new PSU incase this one was underpowered. No change.

CPU fan spins and BIOS shows CPU is working. Changed CMOS battery.

Only thing i can see causing this now is the motherboard.

anything else?

Regards

Chris
 

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I would look at the CPU temperature in the BIOS setup if it has that option. Also reset the CMOS using the jumper (changing the battery won't cause a reset if done quickly enough).
 

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Discussion Starter · #3 ·
ok, so i've checked the CPU iin bios and reset the bios using the jumpers.

BIOS shows the following for the CPU

(CPU is an AMD Athlon 64 x2 4000+)

CPU VCORE - 1.26v
+3.3v - 3.31v
+5v - 4.94v
+12v - 11.85v
Voltage Battery - 3.02v
VDIMM - 1.80v
CPU Tcontrol - 25c
Current SYSTEM Temperature - 32c
CPU fan speed - 15558 rpm


CPU looks fine to me.
 

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I am assuming the machine completes post [since you have accessed the bios] then you have the problem. Is that correct?

It would help if you posted the exact specs ie make and model of mb, brand and wattage of pw supply, etc.
 

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Discussion Starter · #5 ·
Yes gets post boot. Hits either the windows loading screen (with the scroller) seems it crashes when it wants to load anything from the HDD. (I have now also tried a new SATA cable).

Machine is as follows;

Emachines
AMD Athlon 64 x2 4000+
250gb HDD
2x 1GC Crucial RAM (replaced during test)
Motherboard - ECS HT2000
Onboard VGA
 

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Well since it is emachine, it is a very cheap board so replacing it probably should be done in any case.

Since it does complete post, I would tend to think something else is possibly wrong. When you posted you tried with everything removed, did you include any usb type device ie printer, scanner, hub; any add-in cards pulled like sound, etc?

If that emachine has a bestec pw supply, I would replace that also. Those are junk and have caused a number of board failures when they fail.
 

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Discussion Starter · #10 ·
Well since it is emachine, it is a very cheap board so replacing it probably should be done in any case.

Since it does complete post, I would tend to think something else is possibly wrong. When you posted you tried with everything removed, did you include any usb type device ie printer, scanner, hub; any add-in cards pulled like sound, etc?

If that emachine has a bestec pw supply, I would replace that also. Those are junk and have caused a number of board failures when they fail.
When I removed everything i mean everything, im talking even Audio and USB internal cables. I have tried a new PSU with no luck still does the same. The PC will sit in a pre boot state for as long as I like but as soon and you select the OS to boot (as it gives options of startup repair or normal boot) once you select one then it fails.

Yeah very cheap PC unfortunatly - Not mine thought :)
 

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I would change the boot sequence in BIOS so that an optical drive is the 1st boot device. Insert a bootable CD, restart and see if the machine will boot to the CD.
 

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In most cases if a machine will POST the board is good, the exceptions being if you have a defective IDE or SATA controller (whichever is applicable). In this case I would guess the board has defective controllers.
 
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