Clevo W230SS LCD Black Screen - (PC Specialist UK / Metabox AU)

Clevo W230SS LCD Black Screen - (PC Specialist UK / Metabox AU)

I recently changed the power circuit board (small board that switches the laptop on after pressing the power button). This had water damage and also some residue on the motherboard that I cleaned off. The laptop worked fine apart from the power button not working for three months after the incident occurred; workaround was taking the battery out and putting it back in whilst the power cable was unplugged - this turned on the laptop.

Now the power button is working fine, but the LCD does not work at all. No light and not detecting in the display manager.

Workaround is using an external display.

I've opened up the laptop again and can see no damage, the LCD -> motherboard cable looks fine and its properly inserted both to the motherboard and LCD.

Can anyone suggest what has caused my LCD to not power on/work? Literally no power, don't understand as the water residue was nowhere near the LCD cable connector and the LCD worked fine previously.. it had water damage from Early January so months it worked fine.... to replace a broken component which breaks a perfectly working one ;x ?

 

If you throw some light on the display when the pc is on and with no external monitor connected, can you see anything? If there is a faint image which is visible with some external lighting then the backlight circuit on the motherboard is bad, which is very typical when water damage and the resulting board corrosion occurs (although you mention that device manager doesn't recognise it at all). It would be very helpful if you could borrow a dummy lcd panel just to see if the problem is your panel or the motherboard.

Maybe your power button circuit was shorted and it damaged something else? I didn't quite understand from your post if the display worked at all with the new power button.

 

No light what so ever with the LCD - no backlight. Also, the display stopped working completely with the new power button circuit - just stopped dead in its tracks. This aint a whole new mobo repair is it

 

Well I hope not but without a multimeter and doing some measurements alongside a service manual and the datasheet of the display you won't get far. Trying a new dummy panel on the motherboard will save you a lot of time but I understand that not everyone has one handy, including myself. Either way I hope it is not the mobo and wish you luck in pinpointing the issue.

 

It could be the LVDS driver itself that has been damaged, it will be a long chip near the display connector, see if there is residue near or on it.

 

It might coincidental failure. Have you tried shining a black light on the cable and the connection at the board to confirm no liquid damage found its way there?