Lenovo B50-70 all power ok but still shut off by 3seconds

[ktmmotocross]

Hello
Have this Lenovo B50-70 LA-B091P that strart with all voltages but shut down by about 3 seconds. all voltages is ok, SYS_PWROK is 3.3V, flashed bios but still the same

It have amd gpu, so there can be problem. Any hint? even dis to uma will be good if can be done

Lenovo B50-70 80EW
LA-B091P
sn - MP07V4zp

[mon2]

Power adapter beefy enough to power this unit? Excessive current draw on one of the power rails?

[mcplslg123]

Shift these 3 resistors to make it UMA
R28-R26
R283-R282
R74-R73

[ktmmotocross]

Shift these 3 resistors to make it UMA
R28-R26
R283-R282
R74-R73

thanks i will try

[ktmmotocross]

thanks i will try

cannot find BV for this board . resistors dont have marking on boad

[SMDFlea]

https://www.badcaps.net/forum/troubl...091p-boardview

The pdf boardview is searchable.

[ktmmotocross]

thanks again. dont kno why my searching dont find it

[ktmmotocross]

did DIS to UMA - still the same
did KBC flash - still the same.