not the greatest of news i'm afraid,chris at hantarex basically said everything that i had already suggested-all the electrolitics,r216,check the voltages at the test points,make sure the ground to the neck card is connected.he also suggested you should check for broken traces as the chassis is very old.
it may be a case of a replacement chassis but you need to be careful because the neck size is important,maybe its worth checking ebay to see if one pops up.
sorry i could not be of more help