Too many possibilities to predict if the fuse replacements will make the set function again but I suspect your main power supply has failed so if the fuses blow after replacement, you may have to have the supply repaired or replace it.
You might check, using your model number, at the site below to see if they have a power supply 'pull' available from their stock.
They part out retired sets of all kinds.
Jimmy's Parts
Replace your Convergence Ic's. They are mounted on a rather long aluminum heat sink with numbers such as STK 392-110. If they do then up-grade to the 180's
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