M1 ATX Problem 5v Rail Under Voltage
I'm having issues with my M1 ATX. It has been working for just under a year. However, recently my carpc has not been booting properly (only boots about 20% of the time), 'no boot device can be found'. I have replaced the Hdd and still had the same issue so I checked the rails of the M1 ATX.
Both rails stayed constant when the engine was on, off and reving. However the 5v rail sometimes starts and stays at 3.9v to 4v resulting in me not booting. But sometimes it starts and stays at 5v.
I'm using a Via EPIA-M Mobo, and Lilliput 7" touch screen and a 2.5" Hdd. So I am well under the max 90Watts. I estimate my peak consumption to be no more than 25W.
Has anyone had this problem before?
does anyone have the schematic so I can find the problem?
Any help is really appreciated!