UMC TV

[PrenticeBoyofDerry]

I have a UMC TV (about 3 years old)
In the past every once in a while the volume will increase to 100 without any help from the controls and will not decrease. With a bit of messing at the TV and handset, this could be sorted out.
But the problem has escalated and every time the TV is switched on the volume ramps up. I have removed the batteries from the remote, just in case a button was jammed. The TV will now no longer function by the controls on the side of the TV.
Has anyone got any words of wisdom with regards to the fault?

 

[Lucid]

If you're handy with a soldering iron then you could check for dry joints and bulging capacitors. Also perhaps look for problems around the switches on the side panel circuit board. Get a magnifying glass and torch to help with seeking out dry joints. For bulging caps do a Google search of what to look for, but it's basically a doming of the top or bursting at the base.

Quick fault finding tips involve applying heat from a hair dryer or paint stripping heat gun carefully to caps. You can also use freeze spray on silicon components such as transistors. Caution though...all this has to be done on live circuits, so if you don't already know what safety precautions to take then these are not things you should try.

If all this fails then it's time either for professional repair or a new TV. UMC isn't a main brand but rather a badge engineered product driven by price. You might want to think twice before throwing £100-£150 at a repair on a TV that hasn't proved so reliable.

The other option is going back to the retailer to complain. The Sale of Goods Act gives you some rights. You won't get a full refund or replacement unless the retailer is being very generous. But if you can show that the fault was inherent rather than caused by wear and tear or misuse, then you should be entitled to a partial refund. Check out SOGA for more information on this.

 

[gman76]

I had exactly the same issue with an Asus screen (I've also seen it branded Relisis).

It was a faulty volume up tactile switch on the set (not remote). The give away for me was the fact the volume OSD remained on permanently when in the fault condition.

Hope this helps!

 

[Sam Gangee]

IF the volume OSD remains on-screen then that's the obvious answer. However, the OP didn't mention it and hasn't bothered to come back so we'll probably never know.

 

[PrenticeBoyofDerry]

Hello, I have not gone away. Not had chance to look at TV just yet.
The problem still exists, what happens is the TV will only come on be using the remote. The buttons located on TV do not function (they used to).
Once TV boots up, the volume indicator on TV appears and just keeps increasing up to 100. The volume button on the remote will not control the volume.
The volume indicator stays visual.

 

[Sam Gangee]

Excellent, so you have your answer.

 

[PrenticeBoyofDerry]

So is it repairable or do you replace the switch?

 

[Sam Gangee]

I don't know. I can't see it from here but I suspect that "replace or disconnect" is the answer.

 

[PrenticeBoyofDerry]

I don't know. I can't see it from here

What sort of a man are you then
I will have a look over weekend, if I post a picture would it help with further guidance? Is there any form of testing that would help diagnose fault, such continuity or voltage?

 

[Sam Gangee]

(Short sighted.)

A photo of front and rear of the control might help me decide.

 

[gman76]

Is there any form of testing that would help diagnose fault, such continuity or voltage?

I diagnosed mine by removing the suspect switch, hey presto - fault went away. So replaced switch.

Mine was one of these:

Untitled

• gman76
• 14 Nov 2013
• 1