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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electro-medical.blogspot.com/ http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
I have replaced several power supply units. I never needed a schematic. Order the exact replacement. Unplug the cables to the hard drives, CD/DVD. unplug the power leads to mother board. Remove 4 four (4) screws to power supply being care not to let it fall on the motherboard. It is best to lay on its side to do this work!! Hope this helps. I have the same computer, actually 2 of them. UAW 974
hi , if the computer was plug ed in while power went out and computer was on .you might of got a surge , in that case your power supply is out , its very easy to take off. open the case find the power supply unit dissconect the color coded wire clip from the mother board , also the ones on cd rom and hard drive once disconnected , there are 4 screws on the side of the power unit take those off and the power supply should slid out. next take it to best buy computer store . and they can match the power supply unit foe you its to get higher voltage power unit hope this helps
make sure the top screen ribbon cable is attached to the connector properly, push the cable in as far as it will go and then try again, if that dosent work it may be a fuse on the board prob f2 if that dosent work change both it should fix the problem
MCF 5840 CN
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