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There is a rapid clicking coming from the psu area it seems to be centres around the switch mode transformer. The sound and vision of the tv is unaffected. Can you help Please.

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If the transformer noise is annoying you try pouring varnish on it and let it dry. There should be no more noise afterwards.

Posted on Jul 02, 2009

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ASDA durabrand radio model no. LEDAB0701 information bar has stopped working


Hi - As per original question, NOT A TV, the LEDAB0701 is an ASDA Durabrand DAB Radio, so no remote! Just hit this problem - and found a work-around. Sound always worked - display and backlight failed. Could not spring radio apart - as well as the screw in the battery compartment - there seems an anchor the other end that defeated me. I run off the supplied Power supply and rechargeable batteries. The batteries ran down and I plugged the psu and display came back - for a few minutes! The sealed Power Supply unit (psu) is probably unregulated non-switched mode type. It gave 15.6v unloaded. Unregulated psu's normally run 1.4x nominal voltage with no load and are pulled down to the nominal voltage as the load current is taken (i.e. ASDA psu should have been 9v x1.4 =12.6v not 15.6v).

Seems the radio is sensitive to high psu voltage as when I ran off a regulated psu - problem partly went away. Regulated means you get whatever voltage you set whether no load, half load or full rated load.

Also once switched off fault appears the internal batteries were keeping the display off setting. I used a 12v 1A variable regulated psu. It has 9v, 6v, 5v settings. 5v is too low. 6v works when already running but it needs 9v to start. However the problem is that the display will still switch off if I run for a long time on 9v, so I have to switch down to 6v. Alternative, start on battery and plug in 6v works [6xAA=7.2v nominal, range: 8.5v down to 6v]. Seems some internal components of radio or psu have drifted/become faulty.

You need a positive center/hole polarity. Ideally aim at 500mA or greater replacement psu. Ideally use a variable one so it can be used for other things if your problem is different and this is not the solution. If you have an unregulated variable psu (400mA or greater) try running at 6v (will be higher but perhaps not too high) then switch to 4.5v or 5v (again will be 1.4x higher) but make sure it is set to positive centre/hole.

Apr 12, 2014 | Televison & Video

1 Answer

Turn it on yesterday and i can hear a clicking noise for approx 5 secs then the standby light comes on and no picture. any advice, or reccomened repair


1st POSSIBILITY.....usually after 4 or 5 yrs EHT ( transformer that supplies voltage to tube ) becomes weak - then TV won't get ON.. means no picture no sound ( in some TVs ''garrrr'' like sound comes - that sound is from EHT.... but it is rare....some times ''click click'' sound comes...it is from relay switch ) ..... but LED blinks - in some TVs along with EHT 1 or 2 components like resistor, transistors, etc will also gets deffective ................ 2nd POSSIBILITY - main capacitor (very big in size) is blowing off...................... - so solution is TV circuit board has to be checked to find whether only EHT is deffective or other components are also deffective - price of EHT will be between Rs.250 (US$ 5) to Rs.600 ( US$ 12) & price of capacitor will be between Rs.50 ( US$ 1) to Rs.150 ( US$ 3) ..........iam from bangalore.....i have no idea about component's price & service charge in your area.....this problem cannot be solved by user unless user is a technical person having idea about components (resistors, transistors,diodes,...etc..), having multimeter , soldering iron & other tools...so my suggestion call TV service engineer or contact panasonic service centre

Apr 16, 2011 | Panasonic Televison & Video

1 Answer

Watching tv/w a dvd/vhs player(a seperate machine)the power goes out on the screen.went out with a white flash like usually when i turn it off.now on the bottom where the control buttons are,a red light...


It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that sound that gives it away, this is a typical switchmode Power Supply problem.

Mar 04, 2010 | Sony FD Trinitron WEGA KV-27HS420 27" TV

1 Answer

The tv has sound but no picture. After being on


It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.

You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that sound that gives it away, this is a typical switchmode Power Supply problem.

Jan 28, 2010 | Toshiba 51H84 51" Rear Projection...

1 Answer

Tv does not come on and the power is on it also makes a clicking noise like it wants to come on


It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.

You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that sound that gives it away, this is a typical switchmode Power Supply problem.

Jan 26, 2010 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Power light is on but no picture or sound


It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done.

Jan 22, 2010 | Olevia LT42HVi 42 in. LCD Television

2 Answers

I have a westinghouse tv model number SK-32H240S no picture


It seems that your unit has some sort of Video side, PSU fault, or a problem to the Video section that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done.

Jan 21, 2010 | Westinghouse SK-32H240S Television

1 Answer

Philips 32pw9527/05 tv does not start


Generally these type of problem occurs due to atmosphere contains moisture content. Even if it happens in warm area i suspect fbt leakage. Since this is high voltage transformer it can be serviced by qualified technicians only. Red light flashes indicates the tv in protection mode to avoid severe damage due to some short circuit. I think it is helpful to you

Jul 31, 2008 | Televison & Video

4 Answers

ViewSonic VX910 - what parts i'm looking for?


PSU- Board, Rev.C
Item: B-PS-0204-0076
Compatible with: VX710 VX910 VX912 VX924
BER-2 Number: D9 SCRAP NOT AUTHORIZED
(This item has been discontinued and not available to order.)
Please order B-00002481 instead. Your Price: US$45.00 Each

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