Laptop issues

[lwfitz]

This question is not specific to any OS. I have (a customers) Toshiba Satellite C655, today I changed out the dc adapter and the re-assembled the laptop. Once reassembled I attempted to power it on but the screen just lit up and thats all. No bios. Nothing at all. The fans comes on and I could hear the drive going so I knew it was booting, so I plugged it into an external monitor via a vga cable and BAM.... I had picture.
I have once again pulled the laptop apart and removed everything except one ram chip, reset the bios and I get the same outcome. Just a blank lit up screen.

After all this I spoke with my customer and found out that the laptop had been freezing constantly with as little load as opening a web browser.

My thoughts are that this is video card related and that it has been failing for a while. The freezing makes me think that its more than just a bad cable from the mobo to the monitor.

Any ideas?

Edit:

Also I should have mentioned that I have gotten very close to the screen and tried to see if the display was there at all in case the display was failing but theres nothing at all

[VastOne]

It does sound like a video adapter issue... I have seen several laptops with this same type and all of them worked fine on a connected monitor and each were heat related

[lwfitz]

SOLD!

Thanks VastOne. Just needed a little confirmation from the master 

[lwfitz]

Well after replacing the motherboard it turned out that actually what had failed was the LCD screen 

Oh well, live and learn.

[sqlpython]

 Sorry I wasn't here earlier to share..
I had the same issue twice over 2 laptops in a two year period.
My solution was the same as you finally concluded.
  Easy to be the Monday morning Quarterback but...

In my case ( as I always do and may serve you) I just applied my programming skills.
I never pulled either apart because...

If the an External Monitor works
   then I conclude that  all hardware works
      except the LCD.

So, I just replaced the LCD in both cases and Voila'
The only circumstance that I can think where that test and logic would fail would be IF the External Monitor plug is also faulty.