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How many times the standby light blinks at a time of switch on? Count it. These blinks are fault indications [codes]. Count it. If you wish to get more details about the blinking codes to JVC brand TVs check this site.
vertical output ic needs to be resoldered. careful leaving that bright line displayed on the screen as this will cause a permanent phosphor burn into the tube. this can not be corrected once burned unless you replace the tube. mch
Try Reseting It Unplug It For 30 Seconds And Then Release And Plug It Back In Once You Go To Turn It On Hold The On/off For 10 Seconds and Then Release. This Will Hopefully Restore The Factory Setting And You Can Determine If Its A User Setting Or Hardware Problem.
Worth taking it in since it is hard to find a new TV for less than $300. I have a 32 inch JVC iart that for about 2 years would turn itself off and the timer light would blink. Only thing that worked would be to disconnect and turn back on. Eventually, the tv "popped" I could smell something that burned out and within 3 weeks tv went "dead" Took it to a tv repair place and replaced power unit for $150. I had similar problem with a 19 inch Philips and that tv has been going strong for 4 years since repair.
Yes you could look for the capacitor that is leaky, probably in the 200v line, or you could just open back and turn up G2 screen control on the Flyback. You have Screen and Focus on this black transformer with a long anode lead going to the picture tube of set. Becareful, High Voltage!
do you see a horizantal line across the screen before the set goes off. if you do, you have a problem with the virtical ic. it has to be changed. let me know if you see the line across the screen and I will show you what to do