@A J Stiles
I rather think you have got this backwards - emmission laws are about stopping electronic equipment emitting unacceptably high levels of EMI, not to stop the equipment being interfered with (of course designers do include shielding in sensitive areas for that reason, but for technical, not legislative reasons), It all adds to the background levels of interference which can affect the legitimate use of radio communication. The reverse is not true - an office full of unshielded PCs could quite easily affect things like WiFi reception and mobile phone reception.
Of course MW waves work at radically different frequencies to PCs and the conductors in a circuit board are a tiny fraction of the length of radio waves at that frequency so it was extremely unlikely that it would have suffered problems. Also an MW transmitter, by it's very nature, transmits over a relatively narrow band of the EM spectrum - of much more concern is "wide band" inteference than blasts out over a wide range of frequencies.
Incidentally, whilst strong interferences at MW frequencies won't interfere with a PC, it can be highly problematical to ADSL. Faulty equipment (although, not usually PCs), can cause severe local problems with ADSL and that is clearly perceivable on MW radios.