My ECS P4S5A REV. 1.5 motherboard will not turn on. Power LED flashes on then off, after I press the power button. I changed the power supply, still same problem. I need a copy of the repair schematics. Thank you.

did you put the 4pin power in the board and 24 pin in then check the cpu fan in the right place make sure that all plugs are in the right place as well put in video card

go here download manual http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?DetailID=39&MenuID=24&LanID=0

A bad Power Supply with a weak voltage rail, will produce the symptoms you've just described.

1) IF all of the LED lights were on at once, they would use less than 1 Watt of power.

2) EACH fan uses 2 to 3 Watts of power.

3) A typical Processor can use from 51 to 125 Watts.
Just depends on what Processor it is.

You press the Power On button. The first chipset (Integrated Circuit) to receive power is the BIOS chipset.
BIOS detects what devices are installed, does a Ram Memory count, turns the Processor on, and hands the computer over to the Operating System.
(Windows XP is one example of an O/S)

Have you tested the main voltages of the Power Supply?
A) The 3.3 Volt power rail
B) The 5 Volt power rail
C) The 12 Volt power rail

(12 volt rail must be 11 volts or more. Less = new Power Supply)

Post back in a Comment.

Regards,
joecoolvette

http://eudownload.ecs.com.tw/dlfileecs/manual/mb/eng/p4/p4s5a51aeng.zip

There you have the manual, if you need to download anything from ecs justo go to http://www.ecsusa.com
and select download.

Best regards

Usually Schematics for motherboards are not provided to download. Try sending request in the Contact Us section of manufecturer's website. ([email protected])

you can usually get caps at radioshack for less than $5.00 but soldering them in in out takes talent time and a steady hand.

may u have a grouded DVD drive, did u try another DVD or CD drive? may be it will help.....

try to do the ff:
before you replace your Mainboard.

1.did you try to set your bios to default settings ,then save and restart.
2. try to clean your memory and memory slots ,
3.try to remove your other hardware except the video card and restart your unit.
4.try to reformat your hardisk.

check all wiring connections going to the board, also check that the bios jumper is not set to clear bios.

if you know how to dismantle your laptop, then look for the 1500uF 6.3V capacitor that blown..
it looks like this
then you need to replace it.