Hi, I have an emachines 2210 with intel D845GVSR board. The power supply failed and damaged the motherboard - is there any chance the board is repairable? A working psu from another computer has been fitted but the psu fan does not run, there is no bios beep, and only the green 5v standby led lights on board. I would be very grateful for any suggestions you can offer. Thanks, Alan.
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We have repaired many of these systems. The board was damaged when the power supply shorted. You can get replacement motherboards at www.barebonekit.net click on the link on the left side for motherboards and look for Emachine.
ELECTRIC SHOK OR IMPROPER EARTHING IS DAMAGE POWER SUPPLY,MOTHERBOARD,PROCESSOR,RAM
HOW TO CHECK IT.
(WHEN CHECKING KEEP CAUTION :- REMOVE HARD DISK DRIVE POWER SUPPLY SOCKET)
1. check power supply watt 400/450 and same another power supply install and check it. if power supply change and system is working ok so problem in your power supply.
2. check CMOS cell on motherboard,(3 volt)
3. Bfore power supply changing check on mother board any capasitor is like as damaged or not.
OR check main chipset ic is marked as intel.whenpower on it is very hitting or
normal)if very hitting require to repair your motherboard.(intel chipset ic near cmos cell or pci slot,)
4. checking of ram on other pc (working or not)(one beeps coming or not,if one beep coming ram is working ok)
The "Ultra Helpful Instructions" that Emachines provide (here: http://downloads.emachines.com/userguides/8511279_eM_NG3_chassis_HW_ref_en.pdf) state that when replacing the system board, "18. Attach all cables to new system board", but fails to say where that would be for each cable.
The site below says it's a genuine Intel board in there, so, congrats on that. http://www.e4allupgraders.info/dir1/motherboards/socket478/D845GVSR.shtml
And with that, the link to the manual: ftp://download.intel.com/support/motherboards/desktop/D845GVSR/SR_English.pdf
You're looking for the info on page 32, I believe.
I have not identified the specific components on the motherboard that blow, but I can tell you the defect in the Bestec supply. The +5 VSB, which is the voltage that is on at all times, loses regulation and climbs to 8-11 volts. I believe this "higher than the required" +5V takes out the components on the motherboard involved with the computer/power supply "turn-on" circuitry. The "on" button on the eMachines front panel no longer turns the motherboard on because the "kept alive when the main power is off circuits" - which allow the on/off button to do its job of turning on the machine - no longer work.
Test your Bestec power supply by plugging it in the wall socket and have it not connected to anything. Read the voltage between the purple wire and any black wire. If you see +5.0V, then this wasn't your problem. If, like it did on mine, is closer to between 8, and 11 V, this is what took out the motherboard.