toshiba laptop - new keyboard still didnt work


i have a keyboard issue on my toshiba laptop. all the keys were not working. i bought a new keyboard with the same spec from the same model. install it and the keyboard still didnt work.

i have also cleaned with airblow the place where you plug in the keyboard. i thought there might be dust which prevent the keyboard from workin. but the keyboard still didnt work.

the toshiba satellite pro l500 is working perfectly fine - however the new keyboard is not working at all with all its keys. the light at NUM LOCK is on within the keyboard itself - otherwise everything isnt.

please help.
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andreasSystem AdminCommented:
does an external usb keyboard work?

Does the internal keybaord work within the BIOS? Can you press the hotkey for entering BIOS setup with the internal keyboard?
BakakaAuthor Commented:
hei andreas, the external is perfectly fine. i have been using the external keyboard since then. also, attempting to hotkey for bios isnt possible as the keyboard is completely dead. f8 or f12 hotkeys will not work when pressed upon startup as the keyboard isnt working.
andreasSystem AdminCommented:
then it seems there is a problem on the mainboard of the laptop. Or with the connector where the ribbon cable is connected to the mainbaord.

Both is not fixable without changing the mainboard, but this is very expensive and usually not worth.

Buy a small bluetooth keyboard which originally sold for tablets and connect that, this way you are still mobile, without carrying a normal larger sized keyboard.

You still may try to clean the connector again with a non fuzzing non static material to be suer its not a contact problem.

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BakakaAuthor Commented:
thanks andreas i will try that. i totally agree with you. i suspected there is a problem with the connector where the ribbon cable is.

motherboard alone is very expensive. i will try and dismantle the laptop and see where the real problem is.

ill update you back sometimes soon.

andreasSystem AdminCommented:
be careful when doing this. remeber where the screws were and all cable positions and be careful with the ribbon cable connectors. they break easy, and if they are broken your laptop might be unusable depending on what cannot bwe connected back.

If you need to disassemble the cooling system you need to have new thermal compound (if not the rubber pads are used) at hand for re assembling. the old one cannot be reused as it dried already. Old thermal grease need to be removed traceless from chips and heatsinks, b4 new thermal compound is applied.
You might want to try some where like eBay.  Had a look on the US site and found this:

I notice that the keyboard comes with a ribbon cable attached, so I suspect this isn't the problem.

Whilst the motherboard price is relatively low, the amount of work may make it not worth the bother.  Very much a personal choice, I think.
you can always test if the keyboard is working ok by booting from a live cd, like knoppix :
BakakaAuthor Commented:
Thanks guys for all the tips. Very much appreciated. I got alot of solutions to take from here. Cheers, B
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