Question about Compaq Deskpro EN FC 6450+ Model 10000 (129279-052) PC Desktop

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Repiring when start the PC red light blinking every 2second & more.mother board discription was found power crowbar faulty(if aplicable).but i dont find on mother board crow bar section.please help me

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Re: repiring - Compaq Deskpro EN FC 6450+ Model 10000 (129279-052) PC Desktop PC Desktops

Your motherboard is faulty. replace.

Posted on Jan 04, 2008

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Hp pavilion a820n comp won,t turn on . rear power light blinking , turned all power off several times waited long intervals before repowering unplug all plugs and tried still no power up found when mother...

make sure nothing is plugged in to your front card readers slots:
If so PC will not boot. Other then that can you put a different power supply in it? Just to see if it is the Power supply..

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The purple light is flashing in the front and tries to start and won't turn on. disconnected power cord and held button in for thirty seconds still have same issue what could it be?

This can be a faulty power supply or a damaged mother board. here's how you can confirm.

When pressing the power button, inspect the cooling fan that is located on the back of the power unit where the power cord plugs in. if the fan starts then stops immediately, this will confirm a damaged power supply.

Now, if the fan continues to operate but, the CPU doesn't start to power up and load the OS, thsi will confirm a mother board issue. replace the mother board in this case.

Jun 21, 2009 | E-Machines T6216 (827103077834) PC Desktop

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Blinking amber light with green 4 light

If the power light is blinking amber, the computer is receiving electrical power, but an internal power problem might exist.
Try, unplugging the power cable from the pc, and reinsert it, if this does not help try a differnt power outlet, if this dont help, open the computer, take the power Molex conector out of the mother board and try turning it on, if this dont help, take out the Memory modules and reseat them, if this dont work you may want to ring up dell support.

Hope this helps!

Jun 15, 2009 | Dell Dimension 9100 PC Desktop

1 Answer

Gateway GT5014 will not boot.

Ok, this is a mother board issue. the entire mother board seems to be malfunctioning. the blinking amber/green light is confirming this. the mother board may have some fried circuitry and it will have to be replaced in this situation.

I would recommend extracting the mother board and stripping it. look for any discoloring factors that will lead to a burn out location. this will direct you to the necessary repair zone.

Please rate and have a great day:)

May 13, 2009 | Gateway GT5014 PC Desktop

1 Answer

Dell dimension 5150 Diagnostic Lights 31 BLINKING 3,4 SOLID

Hi you've either got the wires on the wrong connectors or they need to be turned around, i.e. red needs to be where black is. Hope this helps

Mar 31, 2009 | Dell Dimension 5150 (DIM515MIN) PC Desktop

1 Answer

Gateway mother board

that means that the mother board either doesn't support the ram or the ram isn't working

May 16, 2008 | Gateway GT4022 PC Desktop

1 Answer

Dell Dimension 4600C will not power up

Sounds like the power supply is faulting. If not it is your mother board that has failed.

Mar 06, 2008 | Dell Dimension™ 4600C PC Desktop

1 Answer

Power supply

A crowbar or crowbar circuit is an electrical circuit used to prevent an overvoltage condition of a power supply unit from damaging the circuits attached to the power supply. It operates by putting a short circuit across the voltage source, much as if one dropped a tool of the same name across the output terminals of the power supply. Crowbar circuits are frequently implemented using a thyristor (also called an SCR) or a trisil or thyratron as the shorting device. Once triggered, they depend on the current-limiting circuitry of the power supply or, if that fails, the blowing of the line fuse or circuit breaker.
A crowbar circuit is distinct from a clamp in that, once triggered, it pulls the voltage below the trigger level, usually close to ground. A clamp prevents the voltage from exceeding a preset level. Thus, a crowbar will not automatically return to normal operation when the overvoltage condition is removed; power must be removed entirely to stop its conduction.
The advantage of a crowbar over a clamp is that the low holding voltage of the crowbar lets it carry higher fault current without dissipating much power (which could otherwise cause overheating). Also, a crowbar is more likely than a clamp to deactivate a device (by blowing a fuse or tripping a breaker), bringing attention to the faulty equipment.

The power supply is bad. I would not try to fix it.

Mar 01, 2008 | Compaq Deskpro EN PC Desktop

2 Answers

Gateway gt4016 no blue light at startup on pc

If the MB is working fine then the power light could just be out

Oct 31, 2007 | Gateway GT4016 Desktop PC

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