please help Lenovo Ideapad C340 screen blank

[qonma]

Please help

Lenovo ideapad C340

screen internal black, but external can display


thanks

[maxsim86]

Re: please help Lenovo Ideapad C340 screen blank

here schematic..can you look at the lcd socket screen

[qonma]

Re: please help Lenovo Ideapad C340 screen blank

i think problem the vga chips, am instal the driver normaly display in hdmi

[qonma]

Re: please help Lenovo Ideapad C340 screen blank

here schematic..can you look at the lcd socket screen

this pdf for amd...nott compatible, but thanks for support

[SMDFlea]

Re: please help Lenovo Ideapad C340 screen blank

this pdf for amd...nott compatible, but thanks for support

You didn`t give the full laptop model number or motherboard part number.When such information is lacking what do you expect.

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[qonma]

Re: please help Lenovo Ideapad C340 screen blank

LENOVO IDEAPAD C340-14IWL
MODEL 81N4
el4C1/EL451 LA-H081P REV 1.0

[JaroTech]

Re: please help Lenovo Ideapad C340 screen blank

Hi, what are the voltages you have on pins 1, 5, 6 and 8 of the JEDP1 connector?