Hi these keys [Shft Fn CTRL Rght Down T] in my n900 keyboard is not workin.. i cleaned my domesheet with petrol and tryied to put it back in.. and cleaned the contacts as well..but still cant figureout the issue.. ironicaly i cant find a new domesheet on ebay or anyother website. i have to fix the existing one.

is there any Detailed key matrix picture with respect to Domesheet so that i can figureout which part of my domesheet is broken and manage to fix it?
I checked the keymatrix from maemo wiki and service manual.. but none of them tell me internals of the domesheet and where the supply is routed from
can any one post picture if possible?

You clean electronic equipment with Petrol?

Neat alcohol solution or metholated spirit would be better to use, you might also be good advice to take apart the phone and clean it again with either of those and try again.

Isopropyl Alcohol is the stuff you should be using.
Used for cleaning CPU heatsinks etc