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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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Need make and model #

Posted on Apr 14, 2008

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Lightning struck my house and my tv went out I think it blew something in it like the circuit board are ther more than one board in these tv


If the power light doesn't come on then first look for a fuse. It's very likely a fuse. If all fuses are good and power comes on you might have lost a circuit board. Check eBay for boards. Part numbers are printed on them. They just unscrew and unplug. However it could be either board.

Dec 11, 2014 | Mitsubishi WD-73C9 73" DLP TV

1 Answer

Television has sound but no picture.


The liquid is actually CRT coolant dripping down onto the circuits. It will need to be cleaned with denatured alcohol and then dried good. Then any components in the area where the liquid was will need to be resoldered as the coolant will destroy the solder and the circuit traces if left too long as its highly corrosive to solder.

Nov 18, 2011 | Mitsubishi WS-65807 65" Rear Projection...

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Tv dead power through on/off switch


yes there is a fuse.that is located on the main board.and that fuse is mostly blown and needs to be replaced. you can get new fuse at  www.radioshack.com at the rate of $2.

May 05, 2009 | Projection Televisions

1 Answer

GREEN LIGHT FLASHING


Good Day;

This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source) 1. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR LEAKY C9A60 470 PF 1000 V PART # 154P400030, PARALLEL TO D9A57 ON THE POWER PCB. 2. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR OPEN FUSES F9A04 AND F9A05 PART # 283P043090 ON THE +24 AND -24 VOLT LINES. IF THE FUSES ARE OPEN THE CONVERGENCE OUTPUT CIRCUIT WOULD BE SUSPECT. OR your TV has "COOLANT" (ethylene glycol) on the circuit boards. This fluid comes from the CRT's (picture tube) this fluid is used to keep the CRT's cool, such the name. This fluid from the CRT's leak when TV is on for long periods of time, the chamber expands and the seals leak.

One can remove this fluid by using "acetone" & small brush. The fluid is hard to see, use bright light, they spots can be smaller then a DIME. Also, the fluid can corrode the parts and traces on the boards. To protect the TV in future place heavy plastic or thick cardboard over affective area, make sure TV has proper air flow around TV. Good Luck, big IRISH.

Sep 03, 2008 | Mitsubishi WS-55511 55" Rear Projection...

1 Answer

Ws-55511 no power


Good Day;

This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source) 1. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR LEAKY C9A60 470 PF 1000 V PART # 154P400030, PARALLEL TO D9A57 ON THE POWER PCB. 2. SHUTDOWN AT POWER WITH SELF DIAGNOSIS ERROR 2 2. CHECK FOR OPEN FUSES F9A04 AND F9A05 PART # 283P043090 ON THE +24 AND -24 VOLT LINES. IF THE FUSES ARE OPEN THE CONVERGENCE OUTPUT CIRCUIT WOULD BE SUSPECT. OR your TV has "COOLANT" (ethylene glycol) on the circuit boards. This fluid comes from the CRT's (picture tube) this fluid is used to keep the CRT's cool, such the name. This fluid from the CRT's leak when TV is on for long periods of time, the chamber expands and the seals leak.

One can remove this fluid by using "acetone" & small brush. The fluid is hard to see, use bright light, they spots can be smaller then a DIME. Also, the fluid can corrode the parts and traces on the boards. To protect the TV in future place heavy plastic or thick cardboard over affective area, make sure TV has proper air flow around TV. Good Luck, big IRISH.

Aug 18, 2008 | Mitsubishi WS-55511 55" Rear Projection...

4 Answers

Tv screen looks like an hourglass!! i need set up code for a is-tvhd30


Your problem is not an adjustment. You will need to change the convergence IC's. What brand and model number is this TV?

Mar 30, 2008 | Projection Televisions

2 Answers

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...

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 www.servicemanuals.net to get a schematic for your set
I hope this helps,
Thank you,
Shuttle83

Feb 11, 2007 | Sony KP-46WT500 46" Rear Projection...

1 Answer

Flashing red light


Joechillin, how much TV repair experience do you have and do you own a mutimeter as well as an osilliscope? Ok first thing your going to need to do is to get a schemtic diagram. Find out with the scope, if the horizontal drive pulse is there when you turn on the set. If it is not then go back to the SMPS and check that. If it is, check the drive all the way up to the horizontal output transistor. If it is good up to there, and still no sweep power supply? Your going to most likly need to replace the flyback transformer and the horizontal output transistor and go from there. If you are there with this, great. But really man if you have no TV repair experience, we cannot teach you how to, as there are alot of factors involved. There is also alot of High Voltage inside these sets when the plug is even out of the wall. Also everything inside these sets is mounted or soldered on a printed circuit board. This set is a solid state TV and there are NO user replaceable parts inside. My friend, I would Highly recommend that you call in a trained service person to assist you with this repair. Good Luck

Oct 08, 2006 | Sony KP-51WS500 51" Rear Projection...

4 Answers

TV not responding to remote


you can check your remote with a celular camera turn on the camera and point to the lens you most see the remote blinking if yes then wait for techman he will give you somes tips...good luck

Aug 05, 2006 | Samsung HCJ552W 55" Rear Projection...

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