Chosen Solution
Hi, my JVC LCD TV (LT-32DR1BJ, it’s not an LED model) has suddenly gone dark, but not really dark like the problem people usually seem to get… it’s just like the brightness has been fixed at the lowest possible value or something. Turning the settings to their maximum only brightens it a tiny bit. Apparently it occasionally flicks into being bright again for a while. I’ve attached an image but it’s hard to capture, everything is still easily visible, but just way too dark, in fact with some images it almost feels acceptable. It’s uniform over the whole picture. The menus are dark too. Any idea about what’s going on and what I should suspect first? I’ve had a look over the boards and I don’t see any bulging or leaking capacitors, or anything else which doesn’t look right.
Hi @andy29 Don’t know the TV but if it is a LCD TV and not a LED LCD TV then it may be using CCFL tubes for the backlighting. Couldn’t find the service manual for your model but on another JVC LCD TV in the specifications it shows that it uses CCFL tubes and also that the power board feeds “inverter boards” connected in the panel. The tubes may be mounted at the top and/or the bottom of the screen. Inverter boards are usually what are used to provide the voltage necessary to operate the CCFL (cold cathode fluorescent) tubes. It may be that the CCFL tubes are failing or that the inverters may be the problem. Just a thought.
