There are 3 capacitors which fail in the mains to 12v smps board.
100uF 25V 105C startup cap ( if this has deteriorated you’ll get no startup , or ticking )
1000uF 16V 105C - usually dried out / vented / bulging
1000uF 25V 105C - same , dried out and bulging.
You have to dismantle the unit , then remove the smps board ( can be tricky - need a decent soldering iron for this ) consists of 5 connections , 2 of which are connected to the ground plane.
Once removed - replace those 3 caps.
I have some longer life capacitors on order to see if it helps , also replacing 100uF cap with a 130C rated one, it’s right next to the smps switcher IC heatsink.
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Assembly is the reverse of disassembly.
Don’t get me started on the annoying habit of almost any BM kit to fail at the FPGA BGA joints
I wish we could all go back to leaded solder for BGA.
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