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Hi-Fi Question
DXRulz
23-05-2008
I have 2 Hi-Fi's. A decent one for normal use and an old one for playing Vinyl on. The old one has a Tuner built into it, its one of those intergrated ones with the Tuner/Amp/Tape/Turntable all together and the CD is seperate. The Tuner display now has no backlight and i have to shine light on it to see what it says. What would cause that?
chrisjr
23-05-2008
The obvious answer is that the bulb has blown!

If it is an LCD display then they use a kind of fluorescent backlight and the electronics driving that can also pop.

If you are lucky and it uses a filament bulb - not likely on a digital display more common on an analogue pointer dial - then it might be replaceable fairly easily if you can take the beast apart.

An LCD digital display might need the whole display module changing. And some I have seen are soldered onto the PCB others are socketed (hope you have the socketed variety! ).

But what could be worse is if the driving electronics have popped. Again they could be integrated into the display module. But just as equally they could be on the main PCB of the unit. Which would be a b***er to change. In fact it would probably be cheaper to bin the thing and buy a new one.
DXRulz
23-05-2008
Then again i might use it till it does completely pack up then find another one.
Nigel Goodwin
24-05-2008
Originally Posted by chrisjr:
“The obvious answer is that the bulb has blown!

If it is an LCD display then they use a kind of fluorescent backlight and the electronics driving that can also pop.

If you are lucky and it uses a filament bulb - not likely on a digital display more common on an analogue pointer dial - then it might be replaceable fairly easily if you can take the beast apart.”

Sorry, but using bulbs on LCD displays is the most common method, and such bulbs commonly fail - they are usually quite difficult to replace, and often require the LCD panel removing from the PCB to get to the bulbs. The bulbs are usually specific to that one model, and need sourcing as a spare part from the manufcaturer.
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