Blank LCD on A650IS

What is the model number? If it is only 3 years old, I suspect you have a LCD TV with LED backlight. You quite possibly have a failed LED backlight.

Many LG TVs of this age are starting to fail due to over-worked LEDs in the backlight which create the white light that illuminates the LCD image.

The symptom is TV turns on and off ok, gets sound on the connected video inputs, but has an otherwise black screen with no video on display. You can try to operate the TV near a bright window with lots of sunlight and see if you can perceive a faint image on the screen. A flashlight is often not bright enough to be helpful.

Most of the time, an LED will fail as a short circuit and still allow power to flow through it to other LEDs that will still light up. If one of these LEDs fails as an "open circuit", or if several LEDs have failed in the same circuit, then the power supply detects a fault and shuts the TV down. If the LED is intermittent, you may have flickering. Think of having one light bulb burn out in a string of Christmas lights and having all the lights go out until the bad bulb is replaced... kind of the same thing.

Your TV circuits boards should be fine. In my opinion your TV requires a backlight repair which requires complete disassembly of the entire TV including disassembly of the panel which is a difficult process.

This sounds as though there might be a problem with the inverter (this is a component that supplies a high voltage for a tube(s) that illuminate the screen.

As there are high voltages on inverters, this is really a job for a repair shop.

I'm assuming that the camera still takes and records images as usual and that you can upload them to view successfully from the memory card, and that the camera powers up and the battery charges as usual.

If so, then the most common causes are a failed LCD panel or loose connectors to the panel from the main circuit board, or a failed backlight. Depending on the age of your model, a new LCD panel should be available and the price depends upon the size. A failed backlight or a loose connector is more common though. In some instances, the LCD driver on the main board has failed, and unless under manufacturer's warranty that usually is terminal for the camera.

It's also not uncommon for users to have simply turned off the LCD display. Not all Canon models allow you to do so, but I suggest that you check your owner's manual to eliminate this really simple cause.

Unfortunately I cannot give more specific advice as you haven't stated the exact model of Canon camera which you 're asking about.

That sounds like your back light has gone out. Either the back light or it's power supply failed. If you turn it on and get close a bit to the side you should see a ghost image. That will confirm it is a back light instead of a video section problem. A lcd type display creates the images on the lcd panel, but it doesn't generate any light. The backlight shines through and illuminates the images. Very much like a slide or move projector.

The repair cost really varies from model to model. The actual backlight can be repaired for under $150 in most cases. How ever if the power section is part of the main tv board then the entire main board needs to be replaced. That board on other sim sized tv's can run over $450. This is covered under warranty so the first thing you need to do is check if you have any warranty either extended store or the oem warranty. Then contact the store you purchased or go through the Phillips support to find your local repair depot and get ti sent in. If you do not have warranty then you have to be careful as you are paying for this. You need to get a estimate. A repair depot will have a very good idea of the repair cost.You should also have an idea of what a replacement tv is worth. Once you know how much the repair cost is you can then judge if it is worth fixing or if you should get a new tv. A new tv has a new warranty while your repaired tv will not. So if the repair gets too high you are better off replacing and not having any worries.

Problemas de luminosidade em TVS LCD, geralmente estao situados no circuito inversor (inverter) ou com as lampadas FLC, que iluminam o display (backlight). Melhor consultar um servi?o tecnico se nao possuir conhecimentos no campo da eletronica.

how do you know it is the backlight? Usually people think that's it but it is the inverter.
f the backlight of your laptop stopped working and the image on the screen is so dim that you can barely see it under bright light, most likely you have a failed inverter board. There is a good chance to fix the problem if you replace the inverter board. If you replace the inverter board but the image is still dim, most likely there is a problem with the backlight lamp inside the LCD screen. If that's the case, try to replace the LCD screen. Note: it's much easier to disassemble the laptop display panel when the display panel is separated from the laptop.

I can definitely fix either way if you are out of warranty from dell.
Good luck! EJ Kudelka [email protected] 516-860-2969

Most likely, a bad system board. There are a few different power supplies on camera boards. If the 8 volt power supply fails, no more backlight. If it really is a backlight problem, you can hold the camera in bright sunlight and see the LCD still showing an image. Not going to be something you can fix, unless you are a tech with parts.

Stay in a bright place or room and then try to press the Disp button once twice or even thrice. By doing so u shd be able to notice the picture or the LCD's backlight turning on.

This is part of a known problem with the SONY image sensors that operate the lcd. There is in fact a recall that will replace the bad componets. You need to contact SONY for repairs. Check out this website to learn more about your problem. http://www.imaging-resource.com/badccds.html