Question about HP Bestec ATX-1956D 200w HP Part No 0950-4106 (ATX1956D) Power Supply

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Green light flickering no startup psu shot ?

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I just went through that and it was the power supply

Posted on Oct 06, 2010

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Why is the green led blinking on my M3N72-D motherboard


The flickering green LED on the motherboard is illuminated by the standby power supply, a small completely independent, always on, 5 volt power supply labeled 5VSB usually, output is on the violet wire.

Here's some more detailed instructions about how to check a PSU.

Try to borrow a known good PSU of around 550 - 600 watts. That will power just about any system with a single GPU. If you cannot do that, use a DMM to measure the voltages. Measure between the colored wires and either chassis ground or the black wires. Yellow wires should be 12 volts. Red wires: +5 volts, orange wires: +3.3 volts, blue wire : -12 volts, violet wire: 5 volts always on. Tolerances are +/- 5% except for the -12 volts which is +/- 10%.

The gray wire is really important. It should go from 0 to +5 volts when you turn the PSU on with the case switch. CPU needs this signal to boot.

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My Sharp 32 inc turn off suddenly, power green light turn to red, went turn on again screen ok for 5 to 10 second and start blink 3 time and screen turn off and power light change back to red. What...


sounds like something is shorting and the safety on the psu is kicking in.is the backlight behind your screen flickering prior to it cutting out. if so sunds like a cft has gone faulty. can be fixed though

Jun 08, 2011 | Sharp Aquos LC-46D62U 46 in. LCD HDTV

1 Answer

When I put the plug into the PSU for my sony tower pc the green indicator light just keeps flashing. Now when I unplug the 24 pin connector from the mother board the light on the PSU is steady green. What...


the PSU has Problem . It is not supplying enough voltage to boot the PC, capacitors inside the PSU are weak or damaged. Its dangerus to open the PSU coz, Capacitors have high voltage currents. If you have the Knowledge of electronics, then open the PSU and detect the Weak or Leeky Capacitors and replace them with new one( this method is for experiment and thrill) . But the replacement new PSU is better , perfect and cheaper then repairing the psu from outside. best of luck

Feb 03, 2011 | Gateway Bestec ATX-300-12EB3 305w Power...

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Pc not starting from pressing power on. Green LED for SB_PWR is on and when power switch pressed, fan & cool fan flicker momentarily but nothing happens. They do not spin. No LED light appears on front...


> PC had been suddenly powering off several times intermittently for a few days leading up to this state. Does this mean the PSU or Motherboard is at fault?

Yes, either CPU or PSU or motherboard are the likeliest culprits.

It's easier to try a different PSU than to try a different CPU or motherboard.

Nov 18, 2010 | ASUS K8N-E Motherboard

1 Answer

I have had my Philips Flat screen Plasma 42inch TV for about 4 years now and all of a sudden the TV screen will not come on all the tv is showing is the green light flickering and the sound comes through...


Yes, this is caused by a capacitor problem, take the tv apart and on the main PSU board the faulty capacitors will be evident by their bulged appearance. Andrew Eve

Sep 22, 2010 | Philips 42PF7220A 42 in. Plasma Television

1 Answer

Computer will not turn on....how do I check to see if power supply is faulty? I have power supply removed and have a tester to check for dc voltage etc


I just went through a heap of troubleshooting with power supply issues before swapping psu's and finding this was the solution to my problem. Had a closer look at my psu that was faulty, the green light was flashing on the psu, unplugged all components and thought that I now had a non-flashing green light on my psu, on closer inspection the light was actually flashing very fast so appeared to be an almost solid light...the psu was stuffed so replaced it and no more issues. If your power supply has a green light check to see if it is flashing when plugged into voltage with nothing connected to it. If it is a solid light then it is probably ok.

Jun 16, 2010 | Hi-Pro (HP-P401W) (HPP401W) Power Supply

3 Answers

Power light flickering


The power light flickering is normal. Most pc power lights flicker to show it is operating. Also your light on you cd rom or dvd rom will flicker when you put a disk in it. Try it now - put a disk into your cd rom [ or dvd rom if you have that] and watch the power light flicker.
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Apr 11, 2010 | Dell Dimension 4600 PC Desktop

2 Answers

I have a emachine PC. PowerSupply blew up. changed it still down


try to remove the memory and put it back again make sure put it fit and correctly

May 28, 2009 | Intel D845EPI (INTELKD845EPILPAK10)...

1 Answer

Power and fan run light flicker in front does not boot up


Relace the psu it's a dodgy Bestec ..replace it with a winpower psu 400 watt , they are cheap but they work better.

Mar 28, 2009 | E-Machines T1842 PC Desktop

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