1. The PCB membrane? The bulb that sits over the temp/fuel/clock, if the membrane circuit under this bulb gets damaged when rotating the bulb to remove/replace it then none will work.
2. You have rotated the bulb holders......sounds silly but best to mention it just in case.....
3. Check for 12V at the multiconnector with it removed and lights on from the edge connector under the dash, PIn 1 (Panel light feed), pin 3 is earth.
4. The Panel Light dimmer control could be the problem in the light switch or the light switch itself.