toshiba c55-b861 no screen

[nabilgo]

hi freinds

this toshiba laptop when i turn it on it turn on evrything is okay but i gotl black screnn and when i plug the vga cable he show data perfectly and i noticed something the screnn become black when u press the power boutoon i flashed new bios but still same probleme ?????????????

[mcplslg123]

Re: toshiba c55-b861 no screen

What is the mb code?? We need to see if schematic is available or not. LVDS pins need to be measured for voltage.

[nabilgo]

Re: toshiba c55-b861 no screen

what is the mb code?? We need to see if schematic is available or not. Lvds pins need to be measured for voltage.

da0bljm6c0 rev c model blj

[mcplslg123]

Re: toshiba c55-b861 no screen

I dont have that schematic and i'm not sure whether its available. Please tell us how many pins are there on lvds/edp connector-30 or 40 pins?? Is the cpu soldered on mb??

[nabilgo]

Re: toshiba c55-b861 no screen

I dont have that schematic and i'm not sure whether its available. Please tell us how many pins are there on lvds/edp connector-30 or 40 pins?? Is the cpu soldered on mb??

40 pin and the cpu is solder to the motherborad

[mcplslg123]

Re: toshiba c55-b861 no screen

Refer to quanta BDBE circuit-it has 40 pin edp. measure voltage on PIN 1-2/4-5/6/7-8/11/12.You dont have image+backlit on internal screen??

[nabilgo]

Re: toshiba c55-b861 no screen

Refer to quanta BDBE circuit-it has 40 pin edp. measure voltage on PIN 1-2/4-5/6/7-8/11/12.You dont have image+backlit on internal screen??

no image but when u turn on pc u can see the screen becoming black

[nabilgo]

Re: toshiba c55-b861 no screen

Refer to quanta BDBE circuit-it has 40 pin edp. measure voltage on PIN 1-2/4-5/6/7-8/11/12.You dont have image+backlit on internal screen??

i hope u can givge me some advise

[Vesko356]

Re: toshiba c55-b861 no screen

i hope u can givge me some advise

He gave you advice, did you measure voltage on PIN 1-2/4-5/6/7-8/11/12?

[mcplslg123]

Re: toshiba c55-b861 no screen

He gave you advice, did you measure voltage on PIN 1-2/4-5/6/7-8/11/12?

@nabiglo, Vesko said it all. Its useless to sit on bunch of advise without actually working on it. Remember, mb is physically in front of your eyes and not mine. With the given clues, you could have surely narrowed down the problem if not solving it.