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Computer motherboard is ESC PT800CE-A when i turn on no power in the mother board what is the problem and causes

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Re: computer

Thank you for your time.
I have a Sony Desktop VGC-RB42G. When I connect the power cord the GREED ligth on the power supply blinks fast, also there is a green LED on the MotherBoard wich also blinks fast.
Computer will not turn on!
Please help.
Thank you.

Posted on Oct 21, 2008

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Re: computer - PC Desktops

Try to replace your power supply.

Posted on Nov 25, 2007

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Computer wont turn on

Is the fan running in the power supply ?
Unplug all the drive power leads and try it.
If it still shuts down, try another PSU, by just plugging it onto the mother board only. If it still shuts down, I suggest it is a motherboard fault. The motherboard turns on the PSU, when you press the on button, it shorts 2 pins on the motherboard to start the power.

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My conputer ( desktop ) turns on but no image on the monitor it shows a message no sync. i already tested the monitor and it works fine.

there are several things that could be causing this issue. 1) could be the power supply has died. It may get some fan spin but never power the motherboard. This would cause what you are seeing. 2) could be the motherboard. If the video is built into the mother board it either could be the adapter or the motherboard itself. If you get no beeps or drive spin noises it is probably either the power supply or motherboard. ( I would try to test the power supply first, very often that is all the problem is, just happen to my dad's computer) 3) if you get some beeps and lights it could be just the video card. If you have one on the mother board try plugging another into one of the slots.
Those would be my first 3 guesses, good luck

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1 Answer

Power button not working. computer won't turn on. I got a light on, on the mother board but computer won't turn on

This is usually caused by either a faulty power supply or a dirty switch. You can find out if it's the switch by pulling the wires off the motherboard where the power switch plugs in, and with the power supply plugged in, carefully short across the two pins. If the computer doesn't start, that rules out the power switch. The other likely culprit is the power supply. If you can get ahold of a different power supply, try hooking it up and power up the computer. If that daesn't work, chances are that your motherboard is shot. Good luck.

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E Machine T6534 fails every 6 to 9 months

This could be caused by the processor or fan,But very unlikely to be the mother board.

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Dell XPS 600 turns itself on to solid amber

Hi. the mother board seems to be having some initialization issues during boot up. this is common when the mother board is failing. i would check to make sure the battery on this board is working. if it is, the board my be ruined.
power board seems to be fine.
please rate and god bless.

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No power

Just open ur P.C cabinate and look when the Power supply is on in ur mother board then there is a green light in ur Mother board ; is it on ??
If the LED is on then I hope ur mother board is ok yet.
Then I think there is some connection prob on the pushing button on the cabinate.
Check it if it is not then u have to replace ur mother board.

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EMachine T3406 wont boot

is there a post beep when the pc is switched on. check the memory if it is a beep beep beep sound , also disconect the hard drive, dvd drive, floppy, and any usb devices and see if it boots up. if that fails it does seem like the mother board, also check the cpu fan has it stoped. also find out the power switch conector on the mother board, from the base unit switch to the mother board. also chech the power connector from the power supply to the mother board , on newer boards there are two that go to the mother board its self , a big one and a very small one .

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check your power supply unit

May 12, 2008 | PC Desktops

34 Answers

Power Green Light Flashing HP Desk Top PC m7250n

During a power outage their is a surge when power come back on the grid (surge can be caused by lighting strikes akso). This surge trips the internal procters inside the power supply to protect the Mother Board, hard drive, processor and fans and any device that pulls wattage from the power supply. Since all these power using devices are trying to pull power at the same time to boot the computer back up one ends up with a loop of surge thrugh the power supply with a protective trip, reset, surge again and trip again. This will continue in this loop as the computer is trying to boot all the devices at one time (Mobo, Hd, processor, cooling fans and other devices). Simoly, more power wattage is being demanded than the protectors will allow at one time causing a protective shutdown followed by a restart followe by a protective shutdown in a continious loop.
The normall sequence for a boot is to boot the board, processor and fans followed by a boot of the hard drive, and other boot devices once the board is energised, NOT all devices at the same time, as this results in an overload and trips the protectors. This protective loop is indicated by the blinking light as the power is turned on and then shut down for protection as the wattage pull is over the demand that the protectors will allow.
Blinking light indictes you are in the protective loop.
SOLUTION: 1. Disconnect the Mother Board connector, with the computer unplugged, this will allow the power supply to reset at maximum wattage upon reboot.
2. Disconnect the Hard Drive power connector and ay boot device power supply cables, this will allow the Mother Board, processors and fans to boot without an overload of the protector inside the power supply.
3. Plug in the computer and the indicator light will be solid green indicating that it is reset and out of the loop.
4. With the computer pluged in and the Power Supply fully energised, plug in the Mother Board. The computer will now boot, and the processor fan will come on and the cooling fans.
5. After computer has rebooted, shut the computer back down and connect the Hard Drive power cable and any other power cablis that were unplugged.
6. Reboot with all cables connected and you are up and running again.


Hope this helps everone with power outages and lightining strikes. It is a rather common problem and can also occure when building a computer and one missmatches the power supply with the board wattage needs. If the board wattage needs are greater than the power supply output you will get stuck in a potective loop eventually. WHEN BUILDING A COMPUTER ALWAYS MAKE SURE THE POWER SUPPLY CAN PRODUCE MORE WATTAGE THAN YOU CAN CONSUME AT THE MAXAMUM LOAD.
Have a great computing experiense.

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2 Answers

Emachines problem... PSU works but comp doesnt turn on

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