HP ProBook 640 G1 On off swith led blinking

[prasath_max]

hi anyboday can help

HP ProBook 640 G1
Board No : 6050A2566302-MB-A04

Fauly When Connect Power Only Blinking Power Swith Led but system not swith on

any on can help or guide me ?

this 3v and 5v power are present

[mon2]

Re: HP ProBook 640 G1 On off swith led blinking

Is the official and recommended power adapter being used? Does the unit work properly with a charged battery?

[prasath_max]

Re: HP ProBook 640 G1 On off swith led blinking

Is the official and recommended power adapter being used? Does the unit work properly with a charged battery?

this is working now. but all power rails are preset but display not coming

original bios backup attached

[mon2]

Re: HP ProBook 640 G1 On off swith led blinking

Confirmed working with an external monitor ?

[prasath_max]

Re: HP ProBook 640 G1 On off swith led blinking

Confirmed working with an external monitor ?

no working. also keyboard cap locks don't on. now i try some bios get online

currnly not switch on board. but continue blink power led when connect harger

only 5v and 3v power rail only present now not switch on board

i got bios from here from here : https://www.badcaps.net/forum/showth...82#post1186382

[mon2]

Re: HP ProBook 640 G1 On off swith led blinking

Remove all power. Meter in resistance mode. Check the resistance to ground of each large inductor coil. Perhaps a shorted cap on the local power rail.

[prasath_max]

Re: HP ProBook 640 G1 On off swith led blinking

Remove all power. Meter in resistance mode. Check the resistance to ground of each large inductor coil. Perhaps a shorted cap on the local power rail.

5v and 3v [ower rails are presen. but when plugin charge contnusly power led glowing

only present 5v, 3v no any other power rails not present