Samsung smart TV intermittently ‘glitching’

[Guineafowl]

TL;DR

Our nine year-old TV has started to develop odd, intermittent, glitchy behaviour. Would it be wise to leave it until a hard fault develops, or do some preventive maintenance?

Model UE55NU8000T, with a ‘smart’ remote operating on Bluetooth (except for the power button, which is IR) and a normal one, which is all IR.

Intermittent faults:
- Loses BT pairing with the smart remote. Sometimes will not re-pair unless the TV is unplugged/plugged at the wall. Always works with the IR remote, except for one case, see below.
- Loses pairing (again BT) with the soundbar.
- Switches on, then off a few seconds later.
- Sometimes will fail to power off (to standby) for about 10 seconds, with either remote.

Steps taken, to no avail:
- Smart remote batteries changed.
- Latest software update.
- Unplugged from wall and power button held for 30 seconds.
- Factory reset.

Given the TV has been powered for nine years, I’m starting to wonder about the power supply electrolytics. Would others dive in and recap the board, or leave it till something more obvious develops, or something else?

I should note, I’ve recapped various appliances over the years - scopes, sound equipment, vintage radios - so am quite happy with the technique and safety aspects.

 

[Greg Bernhardt]

Something wrong with the power supply. Can you do a safe visual check for anything that looks suspect?

 

[Guineafowl]

I can’t see much from the outside. No access panel for the power board so it’ll be a case of spudging horrible plastic clips all the way around to get inside.