Question about Dell - NPS-200PB-73M (NPS200PB73M) Power Supply
Emachine 410. was left on all day, when i returned i found that pc had switched itself off. when i tried to turn it back on the three lights on keyboard, num lock, cap lock and scroll lock all on and the machine made a funny noise and won't switch on.
Same problem. My sons PC was on all night an he noticed several days later when he tried to use it it would not turn on.
I removed the power supply and tried to power it externally but to no avail. I checked the fuse which was still fine.
Does the power supply have some feed back from the mother board in order to start up via one of the harness cables?
emachine 410. was left on all day, when i returned i found that pc had switched itself off. when i tried to turn it back on the three lights on keyboard, num lock, cap lock and scroll lock all on and the machine made a funny noise and won't switch on.
Posted on Feb 23, 2008
I just learned, the hard way of course, that Bestec power supplies, especially the 250w model supplied with desktops by eMachines and some from HP, frequently blow out the motherboard when they fail. Try googling "bestec power supply fail emachines motherboard" (without quotes). No real useful suggestions there, just a lot of ranting about how eMachines and Bestec are crummy, but it gives you an idea of how prevalent this problem is.
Posted on Jan 06, 2008
Power supply failures are very common due to cheap components. PS testers are cheap ( about $5 ) and available on eBay as well as component suppliers. There are many different voltages and connectors coming out of the supply and if any of them are bad your computer may not power up. The testor may show all lines good when the MB connector is plugged in but when you put a load on it ( plug in another connector like the 4 prong drive supply line ) it will fail. There is also a "power good" line on the 20 - 24 pin MB supply that will not allow the MB to power up if values are not in an acceptable range. I recently had a late model Dell Dimension that would not start and the supply tested good with the 24 pin MB connector plugged in - Drive connector plugged in, still good - p4 connector plugged in and bingo - failuire! Replaced the PS supply and all good! Point being that while PS problems are only one of many that may cause a no boot situation, it is the most common and not always obvious.
Posted on Jan 04, 2008
Remove capacitors, big one
Posted on Dec 15, 2007
I sorted the problem and thanks to all that replied. I've bought a new PC! Easily solved.
Posted on Nov 04, 2007
My power supply failed i started tinkerin around with it and found that the connector that goes to the board from the swich, one of the wires where half way pulled out. Found it when i stuck the ohm meter in the back of the conector and it sparked. unpluged it then pushed the wire back into its connector. Pluged the power supply back into the wall Jumped the Green wire to a black ground "all blacks are ground" fired right up
Posted on Oct 23, 2007
You don't need anything except a 300 watt power supply thts all
Posted on Sep 08, 2007
Hi, Are you able to test or repair some of this your self? is so use a multimeter and check the power supply,If you get no reading then remove the unit and open the cover, on the printed circut you will find a fuse either glass or ceramic. Replace this and also clean all dust from the unit replace the cover and reinstall in computer. If this fails you may need a new power supply unit. Regards mistyman
Posted on Sep 08, 2007
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