Exactly. Why every single help request - not matter what it is - starts a chorus of "Wash the board! Replace the caps!" I'll never know, when there are simpler and safer things to try first.
And RFI interference WTF? Just no.
The flashing question mark [?] means that the Mac has completed its self test and is looking for a System folder to boot from. So - work on getting the CF (or some other disk) booted.
No chime:
This is not in itself a fatal sign. Sound output is one of the first things to go wrong as capacitors fail. So, while it may be a sign that there is a bad cap or two, it does not mean that there are severe problems with the logic board.