VPCF12E1E works but screen only on external

[sebuncle]

hi ,
i have a problem with a VPCF12E1E , it start well and go to windows , but I have an external screen display only
i tried other screen , screen cable and inverter but no change it's same.
there's certainly fuse on the motherboard where is it ? which voltage should be on this fuse ?
M931 MBX215 REV 1.1
thank you for your help

[Sparks88]

Re: VPCF12E1E works but screen only on external

if you can use an external monitor the video switching chip is detecting the monitor so you need to try trace the video signal path, i would start at the lcd connector block on the motherboard and trace backwards from there looking for bad solder joints.

[marcellodj]

Re: VPCF12E1E works but screen only on external

Reflow gpu.