Luxman Stereo Integrated Amp Model L-480 Issues

[vortalexfan]

Hello, recently I fixed up a Bell Model 6060 Amplifier and a 6070 Matching tuner with an original Bell MXP-1 Multiplex Adapter and in return for the work the gentleman gave me a Luxman Amplifier Model L-480 and $300 cash for the work. The only problem is (and he told me upfront about this) the Luxman amplifer doesn't work right, I plugged it in and turned it on and all I got was a flashing power indicator light and about a minute later smoke came pouring out of the cabinet with a pretty strong electrical burn smell that smelled like a burned resistor or something.

Anyways I took the amplifier apart and I noticed a couple of burn marks on the amplifier board (where the output transistors are located), and R419a and R419b and R420a and R420b were both pretty toasty looking and measured way out of spec (and I believe those resistors were what smoked inside the amplifier and were where the smoke was coming from in the amplifier).

From what I read online is that sometimes these old Luxman's were notorious for having their bias current drift way off value if they sit unused for a long period time (which was most certainly the case with this unit) and if so would the amplifier's bias current and idle current being off value cause the symptoms I'm experiencing with this Amplifier as far as having smoked
flame-proof resistors and having burn marks on the main amplifier board around where the idle current adjustment pots are at?

Thanks for your help in this matter.