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Pete, Engineer
Category: Electronics
Satisfied Customers: 19413
Experience:  Over 16 years of experience in the Electronics and IT industries.
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panasonic viera tv tqff139 screen has gone blank, there is

Customer Question

panasonic viera tv tqff139 screen has gone blank, there is power to the set.
What do I do?
Submitted: 3 years ago.
Category: Electronics
Expert:  Pete replied 3 years ago.
Hi there,
1. How old is the TV?
2. What is the status of the power/standby indicator on the TV?
- what colour is it? Is it lit, or does it blink at all?
3. Did you have any power cuts or thunderstorms just before the problem occurred?
4. Do you have a voltmeter and other test tools available?
5. What is your level of experience in electronic repairs?
Customer: replied 3 years ago.

Hi Pete

Don't know the age.

Power indicator is constant red, doesn't blink.

Zero experience which means that no equiptment.


Expert:  Pete replied 3 years ago.
Hi John,
The TV has an internal fault, however without a blink code on the standby/power light to indicate a fault code, a TV repair technician will need to carry out several tests inside the TV to find out where exactly the fault is, and then repair it.
This type of fault is typically due to faulty components on the power supply board inside the TV. Usually the board is replaced, for a cost of around £100 + labour, so could end up costing £200 or more.
If the TV is under 2 years old then it will be covered by a 2 year warranty if bought within the EU, so it can be returned to the retailer for a free warranty repair if purchased within the past 2 years.
Otherwise, it would probably be more cost-effective to put the money towards a new TV.