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Tv does not power-up. power into set good, fuse good. was looking for schemtics to trace circuit.

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Posted on Apr 14, 2008


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Image completely distorted

You will need the service manual to locate the blown resistors and or the circuit protectors in this TV set. If you know how to read the service manual, the schematic, and trace the circuit, know how to use and ohm meter and a volt meter, I am sure we can fix this set together. Let me know with an e-mail address so I can save you 30 bucks for the service manual. Good Luck

Jul 28, 2007 | Sony KP-51HW40 51" Rear Projection...

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I have both my lowbeams not working in my 2012 VW Jetta S. I checked the bulbs and both look good. I need to check the fuse but can't locate a diagram. Any help with a diagram?

Most auto headlamps are powered via an automatically resetting circuit breaker. Location varies per vehicle - some have it in the light switch, others in the fuse box and others still - elsewhere. Check the DC voltage at the low beam power socket. If present - the bulbs only "look" good - but really aren't.

If no power, you'll have to trace wires or get a manual to help you locate the low beam circuit. This can be tedious, time consuming work. Good luck!

Oct 28, 2015 | Cars & Trucks

1 Answer

Surge outage tv not coming on

Quite possibly just blew TV fuse, but may have more damage, usually to the power supply circuit.
Unplug TV & remove back & do a visual inspection of all PCBs & wiring. your looking for physical damage, traces of arcing, parts blown apart or damaged/discolored.

Jul 22, 2014 | LG Televison & Video

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Send your email address to me by Fixya comment, and get back a copy of it by return mail.

Sep 01, 2012 | Sharp 19C140 19" TV

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No power to Air Condition Clutch on 1995 Lightning. Fuse #6 is good and there is power there. Where should I look? Thanks for any advice.

If no power at the clutch connector, then there must be an open in the circuit from the fuse to the clutch. Trace the wire back as far as you can, probe the wire with a test light to check for power as you trace the wire. Find a wiring diagram somewhere, google or the dealership to help you trace the open in the wiring.

If you need further help, I’m available over the phone at

Feb 27, 2011 | Ford F-150 Cars & Trucks

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My tv keeps blowing the main fuse. Any solutions.

yes this mean there is a dead short, I would look for shorted diodes in the power supply should be at beginning, tracing back into tv circuits

Feb 17, 2011 | Emerson LC320EM8 32 in. LCD TV

1 Answer

I have a 2003 durango and my amp fuse blew, i went to put a new fuse in and it sent sparks toward the new fuse, i finally got the new fuse in and it blew again, any suggestions? I am driving without a...

it is confirmed you have a short within your set. Please remove and open the set. using a multimeter cross leads from the positive +B to the ground for any short. trace it to the power circuit. you will need to go tracing detaching and checking to arrive at the fault. Look for shorts in the diodes, possible reverse polarity can cause diodes to short. check for power amp. for short , remove the power leads suspected to confirm. I am sure you will arrive at the fault. Good day

Jul 12, 2010 | Dodge Car Audio & Video

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No Power

all sets must have rated fuse for protection. some units now use what is called a PICO-FUSE.this type of fuse is soldered into the pc board. usually marked with location i.d. F301,F901,F400. etc. these fuses look like resistors or in-line coils. check continuity w/ohm meter. if new fuse blows as soon as you plug in tv, suspect bridge diode ciruit or main filter cap(large ripple filter by main fuse. if new fuse blows when you try to turn on, suspect 130v regulator or high voltage short(horizontal-output, flyback transformer) good luck!

Feb 20, 2009 | Televison & Video

2 Answers

Dead no pic no sound

This looks like a problem with the H Voltage or switching power supply section of the TV set. What you need to do is to measure the voltage from the HV transformer to the Anodes of the CRTs with a high voltage probe, and check the voltage output of the switching power supply. What may have happened is a component may have shorted out causing an over-current condition with is triggering the shutdown circuit (These are the relays you are hearing). I would check the Horizontal Output transistor or a driver transistor, and the components in that section of the TV.

In addition check the voltage test points on the HV / Horizontal and switching power supply board. This will determine if the section is working or not (most likely not). Make sure you have a schematic, and multimeter and a high voltage probe.   Since you have checked most of the common Items I am leaning towards one of the fuses in the system, I would suggest getting a schematic since switching power supplies can be tricky. Trust me I remember the days when a tech could find a fuse on a board easily, those days are gone some fuses even look like ICs now they are called digital fusible devices.   try to get a schematic for your set
I hope this helps,
Thank you,

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