Toshiba A300D-205 power on but black screen

[periklis]

Hi there i have a problem with this laptop above, It won't start black screen and nothing.
I tried take off the dc and the battery press the power button for 30 sec but nothing, tried to connect with hdmi in external screen nothing again. I took off the ram nothing, took off hard drive disassembled the laptop clean it inside check the connections still nothing black screen. The laptop power on but it won't close from the power button if you push it for a minute, when it is on.
No bios with F2, fan is spinning and hard drive also the led lights in keyboard are working. is it the screen or the motherboard i don't know.
Please any help would be appreciated,
Thank's,
Periklis.

[drake3d]

Disclaimer - I can not see the system so any diagnostic is purely speculation - End Disclaimer

But it sounds like it is a video chip issue from overheating. I have seen this several times and have done a chip reflow on one and it worked.
The fix is only temporary. Since the design is at fault. The fan and heatsink can not wick enough of the heat away from the chips and the solder joints/balls melt and the chip lifts slightly and loses contact with the circuit.
If you are willing to do the work yourself there are instructions all over the internet search for video chip reflow. If you are not then there are some places that will do it for you for a price of around $100us on up.
Obviously if system is under any warrenty use that.

Good Luck
Dave

[PC Ops]

Had the same issue with exactly the same laptop. Turned out to be an empty CR2032 Easy fix but wasn't the 1st thing that came to mind

[periklis]

Originally Posted by PC Ops

Had the same issue with exactly the same laptop. Turned out to be an empty CR2032 Easy fix but wasn't the 1st thing that came to mind

Where exactly is the CR2032?

[anglian]

Originally Posted by periklis

Where exactly is the CR2032?

Try This

............................

[PC Ops]

Originally Posted by periklis

Where exactly is the CR2032?

Mmmm..... I answered you from the top of my head but after checking my notes I found out that it was another Toshiba model I had in mind. I had another issue with your specific model (bad hdd). Sorry, I thought I was certain...

Anyways, the fix might still be legit. You'll find a maintenance manual here.
Hope this helps.

[periklis]

Thank's i'll check it.