Just a quick repair

Cerrobend ? see link at the end. 60-40 for desoldering rather than 63-37 adding it to the joint before desoldering. Does anyone find that 60-40 remains in a liquid state a split second longer giving a better chance of desoldering. Yep the temperature will need to be a bit higher, but I am not sure when you melt it into a lead free solder joint what the melting point and freeze point. ASIDE we used to use Cerrobend a low melting point alloys (boiling water will melt it) for specialist pipe bending. I found this link https://en.wikipedia.org/wiki/Wood%27s_metal John

John Harrison

The 5V regulator is probably just powering the processor and LCD display. I'd guess that the 12V may be taken across for the backlighting.

Big Clive

You should unroll a good capacitor as well. It would be interesting if there is any visible difference.

Badger

I guess he wasn't a low voltage electrician for long after that... :-O

Stephen Eyles

Oh dear!!! Just hope it wasn't plugged into one of those switchless sockets!

Stephen Eyles

Planned obsolescence - many cellphone manufacturers practice this appalling deed, as well as TV designers!

Mike Hughes

Samsung TVs are prone to domed capacitors on the power board, just as the 2 year warranty is over.

Rasmus

We had a VFD blow up at work years ago during a upgrade. the low voltage electrician pushed a steel fish tape into a energized 100hp SqD drive, was brand new drive.

This thermostat is a line level thermostat, probably for a baseboard heater or something.

Michael Gilchrest

With it's own PSU, it will also work on a Millivolt furnace control with a thermocouple generator.

Frank

First one I have seen that has a separate supply. All of the thermostats I have ever used were powered from the "C wire" over the cable coming from the HVAC unit. Usually 24 VAC.

Road Tripping Raccoons

The electrolyte that oozes out of bulged capacitors will creep over the outside surface and make them immune to sticky tape.

Dave Davies

Extracting components can be fraught with danger, such as the cover to a 3 pin plug which came away from the main body of the plug (screw and all), as I was removing it from a wall socket last night. It was wired on to new, unused (old stock ) steam press, and had obviously been over tightened in the factory. I sure wasn't expecting that. Bah!

Andrew Donaldson

I often use a crocodile clip to extract small hard to reach components.

Zeedijk Mike

I initially thought it was lack of power cables but then realised it’s a new fangled miraculous self powered device in which the power delivery vibration equilibrium has been disturbed.

Gavin Gilmore

Without watching the video - my guess is the 2nd cab, counted from your little finger (next to the trafo), it looks suspicious. After watching the video: I have learned to trouble shoot troublesome capacitors - thanks to watching endless (in a good way) videos from BC. It does feel like a little victory. At least they didn't place that cap next to any heat sink, I presume the 78L05 could get "hottish", but it should not dissipate more than around 0.7W (at full load). That's still quite a bit for a TO92 housing - but we live in a world where overheated components are the "new normal"

Zeedijk Mike

It may well be.

Big Clive

I did ponder sleeving, but used the tape to save time. The silicone-like aquarium tubing is handy for removing LEDs.

Big Clive

I was kinda thinking it might be related to the severely damaged hand holding it in the picture... But you may be right.

Scott Miller

I find a bit of heat shrink around caps gives you a good grip

Arthur Clampitt

Is it the bulging capacitor on the lower right? ^^

Kevin Bornewasser

Based on the picture it is fairly obvious that it failed because somebody removed the power supply. They also printed DEAD in big letters on top of the display. Probably damaged it when they ran it thru the laser printer.

Mark Trombley