Question about Bush WS6671 28" TV

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Bush WS6671SIL POWER UP/VIEWING

Hi there , new poster here on this Forum. I have a Bush WS6671SIL 28" CRT that has served me well up until I came home from holiday and would not power up from stand-by( The red light would go green but would go dtraight back to red). I left it in standby overnight and my wife managed to get it powered up the next day just by pressing it ON (came off standby). We have left it on ever since and it's been ok but decided to try it off/on again.It was ok powering off then on straight away but left it for a while and trying to get it off standby now results in power up ok but strange noise coming from tv and picture flashing on and off and sometimes the screen only shows half the picture? I have no experience with working on household appliances but work as an electronic tech in the semiconductor industry and want to have a go at trying to fix the TV before shelling out on a repair guy. Many thanks to ayone who thinks they might have an idea what the cause might be , all the best.

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Is the sound a high pitched whine? or an arching noise? since half the screen is black I would tend to believe it is a deflection problem. Which is the Horizontal section were having problems you would experience this. Ok first get a schematic for this television. Either contact the manufacture or get one from www.servicemanuals.com Open the set up. Determine where the sound is coming from I guess would be the switching transformer or the IHVT (Integrated High Voltage Transformer) Then if you have one get hold of your multimeter set to dc volts and begin to measure the power supply voltages leading to the Horizontal section. Your problem will be in these sections.

Posted on Sep 19, 2007

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