20 Most Recent Toshiba REGZA 42WLG66 42 in. HD-Ready LCD Television - Page 7 Questions & Answers

Tv power supply board is the causes and the problems.That the board,where the power a/c cord plug into it.Ur problems is u have many dead parts dying to dead parts call capacitors on the tv power supply board.These capacitors parts are dying to be dead,it will alway bulges or puffing up on it tops.These capacitors are the causes,after u replaced them this problems,will be solved.U have tools and know basic electronic also basic soldering?U can replacing dying capacitors ur self.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.

Hi.

The point is that with LCD TV (which are very different from computer repair) you often need testing before finding the fault. In this case you have replaced amost everything, the fault then is either the T-con, the main boardm (which are only parts with panel and chassis that you have not replaced), or one of the parts already replaced that had failed because of incorrect installation procedure.

Since it is very easy to fry a board, and since a technician diagnosed the inverter (I assume that they tested the TV), testing will start right from the inverter. The inverter is tested reading DC in from main board to master, dc from master to slave, and AC high voltage out from slave, which hosts the oscillator section that should also be tested using an oscilloscope.
Since the TV is in forced standby (protection because the fault is detected), in order to get DC to inverter from main, the control line to correspondent DC voltage from PSU must be activated. The inverter voltage is the higher DC line from PSU. This is activated jumping the control line with the 3.3 or 5V low DC from PSU. In this way both PSU and inverter get tested. The procedure is also a superficial test for some main board functonalities. This kind of test is done with live power and involves testing high voltage lines. For safety reasons the operation must be done by a trained person.

The alternative is once again taking a chance and replacing main and T-con, but as said, that is not a good way of repairing a 42'' TV.

Here parts for this TV.

Regards.

Ginko.

the arrows are the screws you need to remove but this wont affect the tv in any way just take care

I hate to tell you that this happened to me last week and mine is 18 months old. after calling toshiba and going through all troubleshooting, nothing worked. they referred me to a service center near me and the repair is $466!!!!! I have lots of power outages so they can seriously damage a tv (the motherboard to be specific). Mine is the 42 inch 535U. get a surge protector for your cable and ask your electric company to install a power shield on the meter or a surge arrester.. good luck.

You need to lower your PC video resolution to the TV's PC mode native resolution.
http://www.fixya.com/support/r4873371-fixing_out_range_format_not_supported

Basic LCD monitor and LCD TV troubleshooting guide:

http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting

http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV, Monitors, Caps : http://s807.photobucket.com/home/budm/allalbums Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague

The power supplies on this sort of equipment is a safety item. All components that are replaced, and the manufacturers do not supply the components only a complete board, are critical for safety.
If the chopper transister has gone s/circuit, that was caused by an error in the drive waveform. It really is too complicated to explain on a site like this but a blanket change of the driver stage, output stage and control semiconductors will get you somewhere near to a working power supply.
Hope that helps.

It may have detected shorts circuits so it shut itself off. You need to do some indepth troubleshooting. It can be two places: power supply or the backlight inverter boards.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: Please see my basic troubleshooting guide here: http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums http://en.wikipedia.org/wiki/Capacitor_plague Parts: www.shopjimmy.com Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

any advice you get from here is free

CT-90307 is your remote model number.

There isn't separate manual for the remote, but you can download the manual for the 42WLG66 (free) from here:

http://tesc.toshiba.co.uk/Web/ModelLis.nsf/1f82d70b57a6d36d80256a000042a0fb/1600b70b21cbf8188025718d00490dc9/$FILE/32WLG66P%20Euro%20OM.pdf

Once you have opened the file you can print it or save it.

Please rate my solution if you find this helpful. thanks.

do you get sound when you turn the tv on with a source. if so then I would suspect the voltage to the inverter board or the inverter board itself.

I would check the power supply board for bad capacitors. check to see if the caps are bulging on the top if they are then replace with same rating caps. hope this helps.

This is probably because of the refresh rate difference from what the computer is set to in order to suit the monitor, and is either too low/or too high for the TV to handle. Try lowering the refresh rate to see if it's able to handle the signal.

There is No cheap Panels Avalible and the issue it you need the one for your model as other OEM models may not be compatible. The last time i check into this it was cheaper to buy a new tv are you sure its the panel?

If this is only the buttton but the set is working allright, you can mend the broken one with a fabricated button. Get help from a plastic shop / machine tool shop or use an old knob to be stuck up and fixed into for activation of switch.
Have the set connected to an external switch and use the remote to switch on than the damaged switch which must be kept ON.

I'm assuming that you have tried all image setting (contrast, brightness and color) with no result.
The image is no longer rendered correctly because either the image processor has failed (the mainboard will have to be replaced) or the Y-sus board is defective. To find which the tv must be opened and the image signal checked with an oscilloscope. This definitely a job for a pro,

Hi,
Is it Toshiba 42WLG66 tv or any other model?
Does power indicator lit on tv front when tv plug in wall socket?
Did you checked wall socket by plugging any thing else to make sure that it is powering?
Let me know above info to diagnose possible cause of problem.
Thanks.

The 24vdc power supply went out or the backlight inverter board went out. Those are the two boards you need to check first.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Please post back what you find.