Lenovo 320 no backlight

[lapfix]

Hello Folks
Lenovo 320 -15AST
Motherboard = NM-B321
AMD with DDR 4

Lenovo no backlight , Fan not turning on even the CPU get hot after a moment , not display at extern too.

PSU =0.300 amp and increase !
PL601/602 = 3/5 valaw ok
Pl 2201 = +APU_CORE_NB = 0.897 v
Pl 2202 = +APU_CORE = 0.897 v
Bios Pin 8 = 1.8 V
8/3 VS ok / 1.8VS ok / 0.95VS ok / 0.6 VS ok /

PLT_RST = UL1 =Pin 19= 3.4v

UE =
pin 34 = EC_APU_ALWEN = 3.4V .

Ram = +1.2V ok / +VDDSPD = 3.4V ok / +2.5V OK

Flashed bios from web site /other site same issue , changing Screen same thing

U7 = +3VS ok but no PCH_ENVDD.

So , what i miss to check else !!

[mcplslg123]

Re: Lenovo 320 no backlight

Check QC9 Working or not. Btw, is mb posting?? Usb KBD numlock glows??

[lapfix]

Re: Lenovo 320 no backlight

Thank you mcplslg
No QC9 at this mobo ( @ ). not posting from HDMI too ,i try keyboard too nothing

[mcplslg123]

Re: Lenovo 320 no backlight

So you confirm your mb is not posting. Why bother about the backlit issue? You are not supposed to get it unless the mb posts. So better check all rails.