Hi Kamnran,

Welcome to the forum.

If the unit won't start, you may have blown something on the DSW.2's comms board. The ferrite-core inductor is unlikely to be the problem. You may need to source a replacement comms board.

I suspect that the DSP3300 may have failed capacitors in the PSU section. If you can remove the rear panel and examine the main PSU capacitors, look for bulging or leakage from the top or bottom of the capacitors.

The G61R most likely requires a new PSU (ECM60UT31), replacement capacitors on the backplane, and cleaning of all the card edge contacts/backplane connectors.

The issue with the optical passthrough may be dependent on what the TV supports. There is limited bandwidth on an optical connection compared to what HDMI can support.

You may be best to find a local tech to take a look.

Good luck,

Steve

Main: 861v6 (LPS), 808v6, UHD722, DSP8000SE Anniversaries, DSP5200.2HC, DSP7200.2, SW1600, Sky Q, Cambridge Audio BD, Roon, M80
Office: 861v4 (LPS), 818v3, 800v4, HD621, M&K S150P, DSP5500HC, M&K MPS2810 sub x2
Son's system: 861v4, HD621, DSP6000.2, DSP5200HC, DSP33
Spare: MCD, 100 Series, 200 Series, 500 Series, F80s, C15s.