Toshiba c660-15g no display on screen but have display on external

[infotech1321]

good day sir what is the problem of the laptop with no display on lcd and have on external.
i check lcd its working on other laptops and lcd cable..

thanks in advance..hope you can help me...

[tibd]

Re: Toshiba c660-15g no display on screen but have display on external

board model?

[infotech1321]

Re: Toshiba c660-15g no display on screen but have display on external

MB model - PWWAA LA-6841P
REV: 1.0

LA-684 SIR...

[highpulse]

Re: Toshiba c660-15g no display on screen but have display on external

chek altough if the image on your laptop with the original screen , isn't on the background ( also chek for lvds signal , such as 19volts line , and enables line 3.3 v
after that we can carry on more tests

[Topher_UK]

Re: Toshiba c660-15g no display on screen but have display on external

Shine a torch on the laptop screen while it is switched on, preferably in a darkened room, to see if there is a faint picture there. If so, but the screen works on other laptops, then I would query the inverter board (if it's LCD) or the backlight controller chip on the motherboard.

If there's no display at all, make sure you haven't set the laptop to display to external screen only

[highpulse]

Re: Toshiba c660-15g no display on screen but have display on external

chek in the lvds connector , what are the voltage value for the following pins.

pin 1 10 12 20 22 24 and 28

[teknikbursa]

Re: Toshiba c660-15g no display on screen but have display on external

good day sir what is the problem of the laptop with no display on lcd and have on external.
i check lcd its working on other laptops and lcd cable..

thanks in advance..hope you can help me...

Same problem with hp G62 and after programming bios with programmer
its ok,So pls try bios programming first

[JaYmEz]

Re: Toshiba c660-15g no display on screen but have display on external

highpulse, i have a Toshiba C660-1LX with the same problem, no display on LED screen but the LED backlight is on. On external screen everything is OK.
Motherboard: LA-6841P rev. 1.0

Here are some of the voltages on JLVDS conector:
Pin - Voltage
1 3,2v
10 3,2v
12 3,2v
20 3,2v
22 3,2v
24 3,2v
28 19,2v

thanks, hope you can help me! =)

[dj_ricoh]

Re: Toshiba c660-15g no display on screen but have display on external

highpulse, i have a Toshiba C660-1LX with the same problem, no display on LED screen but the LED backlight is on. On external screen everything is OK.
Motherboard: LA-6841P rev. 1.0

Here are some of the voltages on JLVDS conector:
Pin - Voltage
1 3,2v
10 3,2v
12 3,2v
20 3,2v
22 3,2v
24 3,2v
28 19,2v

thanks, hope you can help me! =)

i fix yesterday a compaq c700 same problem backlight on, on internal and video on external reflow did the trick!
P.S. Celeron CPU LOL

[JaYmEz]

Re: Toshiba c660-15g no display on screen but have display on external

Just did a reflow on the GPU and the problem continues the same, no change. It just turns on the backlight and no post, if i plug an external monitor it posts OK

[ktmmotocross]

Re: Toshiba c660-15g no display on screen but have display on external

replace igp

[FShahid]

Re: Toshiba c660-15g no display on screen but have display on external

I know it's too late to post on this topic, but I want to share the experience to help others. I was replacing the 15.6 LED screen on C660D-10F (AMD) but after the replacement it wasn't showing the backlight on it (display comes but no light), tried the old screen again but same issue (however whenever I switch it off it did flicker backlight briefly before turning off).

Read this topic and did the reflow of AMD IGP and to my surprise the backlight works again.

[dlshad96]

Re: Toshiba c660-15g no display on screen but have display on external

i have same problem with 3 laptops

L530
C660
E520

have backlite no video ( in internal LED 15.6")
working well in external screen!!

Could any one please give me help

[dlshad96]

Re: Toshiba c660-15g no display on screen but have display on external

chek in the lvds connector , what are the voltage value for the following pins.

pin 1 10 12 20 22 24 and 28

i know its too late for this But i have same problem but the V on pin only 3.3v and 19v others pins no V at all (0) what i have replace please

anu help please
Thanks you in advance