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Re: missing -5VDC and -12VDC
Could be.Some do some don't.Some have a circuit breaker. Take the cover off and check. Be careful though as some parts in the power supply can hold a pretty significant charge for quite a while even after the power supply is turned off.If there is no fuse or if you change the fuse and it blows again I would say a new power supply is in order. Good luck.
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Can you tell if the flashing is a pattern. count the flashes ( long and short) in a cycle. This will provide an error code to hopefully discover the problem.
You may also try removing and reseating the RAM and Video card, blowing out the connectors with compressed air before reseating.. Also look closely at the components on MB for any signs of swelling, leaking, burning etc. I suspect the MB.
that atx connector is faulty it becomes loose because of draw and insert the connector in mother board grips of connector can be tightned by pin the fault may lies in motherboards connector desolder it and replace it
With emachine MOBO's you have to make sure you plug in the 20 pin plug from the power supply to the mobo. Also make sure all hard drives, cd/dvd roms, floppy drives, etc are turned on. Make sure the red switch on the PS is set to 115. Make sure the PS is plugged into a known working outlet. Make sure MOBO is properly in place with all grounds/screws in place and nothing metal near or touching board which may short it out.
You can review the E Machines PS replacement guide here for further instruction.
You're asking for a fire or just burning out the power supply. But,at your own peril, check the yellow wires for 12v or buy a power supply test adapter from ebay. It bypasses the power switch usually done by the motherboard & will fire up the power supply like it was connected to a board. Then test the wires for 12v. Should be any yellow wire,red is 5v. Green is 3.3 or 3v.
disconnect CDROM,DVDROM or any player for that matter and of course any other peripheral attached so as you remain with only monitor ,mother-board,hard disk connected to the power supply.if it doesn't work repair the faulty supply.
The -5 V requirement for ATX supplies was dropped after V1.3. It was used primarily for the old legacy ISA slots - though not exclusively. If you test any contemporary supply made in the last few years if will show a -5 V failure because it just ain't there! Unless you had a really old MB, the supply is probably fine. Look at the 20 or 24 pin MB connector and if there is no line where the -5 would be ( pin 18 ) then you have no problem.
Well, it sounds like it is a mobo problem if u tryed other power supplys, i would test the 4-pin ATX slot in ur mo and see if it is grouding this or shoting it out, umfortualyy u will problem have to have that done professionaly