The customer complained that his Toshiba Satellite A70 laptop doesn’t have video on LCD but the screen lights up when he turns on the laptop.
Laptop diagnostics and repair:
The laptop started without any video on the LCD screen, but the backlight lighted the screen. When you have a problem like this, always try to connect the laptop to an external monitor. If the external video is fine, then most likely the system board or the video board in the laptop are fine and the problem is somewhere between the LCD screen and the system board. I connected the laptop to an external monitor and got a normal video output. To find the problem, I opened up the laptop display assembly and found that the video cable on the back of the LCD screen was half way out. After I reseated the display video cable, the laptop started with the internal video.
Read more:
How to troubleshoot and fix laptop video problems
Laptop has bad video on the LCD screen. What is wrong?
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November 8th, 2008 at 4:23 am
Hi,
Just an update, have fitted a brand new LCD panel (used old inverter & screen cable) and the laptop is up and running now.
Thought this may be useful info for someone else in the future.
Cheers,
Steve
October 23rd, 2008 at 6:29 am
Just in the process of fixing an A100 which works fine through the external monitor connection but when switched over to LCD using Fn+F5, the backlight illuminates but there is no display at all, just an illuminated black screen.
I suspect it’s the screen that’s gone and not the cable (have a screen on order) so will update here but I just thought i’d keep you posted with progress.
Any one else ever had this fault and fixed it on an A100?
Steve
April 8th, 2008 at 3:54 am
i have IBM Thinkpad R52. When I power on my laptop, there is no display but battery led is on. And there is no hard drive led on. if i keep trying power on /off , sometimes it work. when it get worked its system board’s speed shows 335 Mhz. Actually its speed is 1.8 Ghz. I am a student of Computer science. I have tried all my best but didn’t work.
please help me
March 19th, 2008 at 9:51 pm
Julie,
It’s really hard to troubleshoot these kind of problems over the Internet without seeing the laptop. Try installing the old LCD screen back in place and find out if it makes any difference. You replaced all three parts at the same time. Did you buy this display assembly from a reliable source? Are you sure it’s good?
Normally, you replace parts one by one until the problem is fixed.
You said the external monitor works fine, so most likely the motherboard is fine.
If the laptop LCD has backlight but no image, I would check connections first. Make sure the video cable is properly connected to the motherboard and to the LCD screen.
Sorry, I cannot give you a better advice without seeing the laptop.
March 17th, 2008 at 3:40 pm
Yes, I replaced the whole screen, LCD, inverter, and video cable.
The old LCD is fine.
The LCD cable was damaged so I replaced the cable. When replacing the LCD Cable, the inverter broke. So, I decided to just replace everything. The LCD is from the same model.
Thanks for the reply!
March 15th, 2008 at 2:25 pm
Julie,
Reinstalling Windows wouldn’t cause this problem.
What was wrong with the old LCD screen you just replaced? Did you get any image on the old screen?
It sounds like you’ve replaced the whole display panel assembly including LCD, inverter, video cable, right?