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Louie
Louie, Technician
Category: TV
Satisfied Customers: 11449
Experience:  25+ yrs. experience in the field and 5+ yrs. online, down to component level.
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Our Wega KLV-32M1 has begun to power itself off, then back

Customer Question

Hi! Our Wega KLV-32M1 has begun to power itself off, then back on again, for no apparent reason. I've checked all external connections, and everything is good. Although the device is now 10 years ago, picture quality is fine and should have more life yet. Is this a common problem, and can anything be done to fix it?
Submitted: 1 year ago.
Category: TV
Expert:  Louie replied 1 year ago.
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, the described symptom almost always point to an internal hardware issue.Are you then considering a DIY (do-it-yourself) repair approach? If yes, you may need access to and familiarity with the use of a multimeter and even a soldering iron.
Customer: replied 1 year ago.
Yes.
Expert:  Louie replied 1 year ago.
Great on the DIY! Proposed preliminary checks:• with the unit unplugged, visually inspect for any leaks/bloated capacitors on the boards particularly on the power supply;• check for potential cold solder including on the pins/connectors;• with the unit plugged in and powered on, monitor (presence and consistency) the voltages:• connector CN651 pins 1 & 2 - 30V;• pins 5 ~ 8 - 10.5V;• pin 12 - 33V;• pin 14 - STBY 5V; and• connector CN652 pin 1 ~ 5 - 16.5V. A friendly reminder; voltage measurements by its very nature requires that the unit be plugged in, powered on and therefore LIVE! Please exercise due care and caution.
Expert:  Louie replied 1 year ago.
Hi again,
Other than the above suspects of capacitors, cold solder and/or low/missing voltages, check likewise the backlighting circuit particularly the D board (inverter).