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usually after 4 or 5 yrs EHT ( transformer that supplies voltage to tube ) becomes weak - then TV won't get ON.. means no picture no sound but LED blinks - in some TVs along with EHT 1 or 2 components like resistor, transistors, etc will also gets deffective - so solution is TV circuit board has to be checked to find whether only EHT is deffective or other components are also deffective - price of EHT will be between Rs.250 to Rs.600 - iam service engineer (computers, laptops, printers,etc) - bangalore - domlur - 09986222774 - email@example.com - if you are in bangalore then you can call me for service
Hi, 4 blink of power led shows problem in vertical deflection section and most probably vertical output IC is defective, replace it to fix the issue. Regarding .rar file type of service manual files, download winrar software trail version from internet, install it and use it to unzip .rar file to get pdf manual file. You wont get +B volts because tv switch to protection mode and power supply shuts down. Service manual has blinking standby led error code details as well. Thanks.
Hi, Its power supply issue and you need service manual to repair power supply on component level. Get service manual from Manual Zone with little fee and test power out. KV-27V25 is 1996 model and very much old.
Your description can be from a number of types of faults. This can possibly be from the power supply or one of the scan circuits. On more rare occasions, the CRT can be arching or on the edge of spec, and thus the protection in the power supply is triggering.
The best way to fix this is to get the shop service manual, a DVM and a scope, and follow through with the schematics to locate the area of the fault to begin with.
If you don't have a solid knowledge in electronics for TV servicing and a lot of experience, I would not advise you to service your set. I would think you would be best off to take in in for an estimate.
When going in to a TV set yourself without experience and training, there are serious safety issues.
I couldn't tell you where to find a free service manuel as it seems these days every ones looking for a buck for what they offer, but as for fixing it it is possible that the switching board ( the board that houses all the function switches ) is cracked. You can remove the board by removing the 1/4 inch screws and find the cracked section by visually inspecting it. With a soldering iron , solder and some bear wire, you can patch the broken board. After repairing the broken connections, apply some epoxy glue on the back of the board where the crack was and reinstall the board after the glue drys. It should work fine after the minor repair. Good Luck