Flashing bathroom cabinet demister led lighths

11fernsroad

Hi
the LED lights on our bathroom cabinet is flashing all the time.
Touch control lights on the mirror for demist and lights are normally lit have gone out and they are not working.
Unfortunately just out of warranty period.
another bathroom cabinet bought along with works fine( picture attached to show control lightsWhat could be wrong-controls or transformer?
and how to get access to it in case they need to be repaired.
many thanks 

ThisIsWeird

Unless it's a recognised symptom, then it'll be hard to work out what the faulty component is without carrying out actual tests.
First thing, the mirror would need removing from the wall - without 'cuting yourself.
Then, assuming the main components are accessible from behind, a multimeter measure of the transformer output would be the starting point.

FreeBear

ThisIsWeird said: Then, assuming the main components are accessible from behind, a multimeter measure of the transformer output would be the starting point.

Most likely a switch mode power supply, so no (big) transformer involved. If it is a real cheap product, could just be a big capacitor to drop the mains voltage down low enough for the LEDs. Regardless of the type of power supply, be extremely careful probing the internals and always assume everything is likely to be at mains potential.

Vortigern

Mains off first. There may be screws at each side, or at top and bottom. Remove these, while holding the mirror in place. Then carefully pull the mirror away from the wall. If you're lucky you should find the the mirror comes away with no wiring attached. The frame with lamps and controls should still be fixed to the wall.

11fernsroad

Vortigern said:

Mains off first. There may be screws at each side, or at top and bottom. Remove these, while holding the mirror in place. Then carefully pull the mirror away from the wall. If you're lucky you should find the the mirror comes away with no wiring attached. The frame with lamps and controls should still be fixed to the wall.

Vortigern said:

Mains off first. There may be screws at each side, or at top and bottom. Remove these, while holding the mirror in place. Then carefully pull the mirror away from the wall. If you're lucky you should find the the mirror comes away with no wiring attached. The frame with lamps and controls should still be fixed to the wall.

Hi
Thanks for all the comments and tips.
Cabinet is hung onto wall with clamps and it comes off with a wire supply attached.
There is a boxed area  on the top part of cabinet, where i think transformers and circuit boards if any are located. Unfortunately cant see any screws to open that boxed area to have a look.
Along one of the hinges is a wire going to cabinet door which I think is the power supply to mirror and on off controls.
Door itself has mirror with built in touch sensors at front. Back of the door has another mirror attached and I think it has been attached with silicone.
LED strips are both edge of the cabinet vertically.
Switching the main off for a bit-makes the LED strip flashes to go away for 5-6 mins before it starts yet again.
With this extra info,any ideas on how to sort out the problem of constant flashing/flickering LED lights.And as said before the controls lights for LED and demister on the front of the mirror are not lit since the problem started.
Many Thanks

Ectophile

It was probably never intended to be repaired.  Your only option is to work out how to break into the box with the electronics inside, and see what's there.

It will probably be a cheap sealed power supply.  You would then have to find a compatible one on the internet.

ThisIsWeird

11fernsroad said:

Hi
Thanks for all the comments and tips.
Cabinet is hung onto wall with clamps and it comes off with a wire supply attached.
There is a boxed area  on the top part of cabinet, where i think transformers and circuit boards if any are located. Unfortunately cant see any screws to open that boxed area to have a look.
Along one of the hinges is a wire going to cabinet door which I think is the power supply to mirror and on off controls.
Door itself has mirror with built in touch sensors at front. Back of the door has another mirror attached and I think it has been attached with silicone.
LED strips are both edge of the cabinet vertically.
Switching the main off for a bit-makes the LED strip flashes to go away for 5-6 mins before it starts yet again.
With this extra info,any ideas on how to sort out the problem of constant flashing/flickering LED lights.And as said before the controls lights for LED and demister on the front of the mirror are not lit since the problem started.
Many Thanks

Bear in mind that you are talking 'mains voltage' here, so you need a certain level of care and competence if you are not going to come badly unstuck. Also, I suspect the cabinet is wired directly in, and doesn't have an isolating switch - so it's bare-wire time once the unit is removed, which means power off at the CU, and some means of insulating the wires if you remove the unit.

And, really, I would consider this a unit-off job, where you can get a good look at the gubbins, safely on a bench.

So, I'd try a Google for the nearest equivalent of unit, and have a read of the supplied installation instructions.

If you can work out how to safely remove the unit, and isolate the exposed wall wires, we can move on to the next stage. Respectfully, without this, I don't think anyone can suggest how to 'fix' it.

11fernsroad

Hi
i opened up the control box and found that main transformer is found faulty and causing tripping.
LED strips and shaver socket+ shaver transformer is working fine.
problem is present transformer has a “plug in type of connection” for LED strips and demister.
It also has another outlet to supply shaver transformer.
it would be much easier to buy same make model and replace it rather than buy another make and struggle with connection.
unfortunately no name of the make except 
model 30w b-bk written on it.
i have attached the pic of the inside.
Anybody has idea what this make is or best alternative?
many thanks

Ectophile

I've never heard of that make.

You're looking for a 12V 2.5A power supply from a reputable supplier.  But make sure it's the right size to fit.  Unless you get one with screw terminals, you may need to be handy with a soldering iron to wire it up.

JohnB47

No expert here but I'm wondering what you mean by "found that main transformer is found faulty and causing tripping." How did you determine that?  I would expect that a mains transformer fault would stop everything working (on that equipment) not just a part of it.

Actually I'm not really certain what the fault is. The touch controls are not working, it seems. But what are the LED lights that are flashing all the time? Could the problem be with the LEDs - going wonky and causing problems with the touch controls? (I've had LEDS flashing, in other situations, although not causing issues elsewhere). Just a thought.

11fernsroad

You may well be right.
The RCD was tripping this morning with bathroom cabinet connected.
Once the power supply to bathroom cabinet was disconnected the electricity stayed on
I disconnected wire from transformer to mirror/demister/touch controls-it still tripped.
I then disconnected wire to shaver socket-it tripped again.
At this point only part supply was connected to was the transformer.