Question about Mitsubishi VS-45603 45" Rear Projection Television

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Mither board shorted by leaking picture tube

Any ideas how to replace? where? how much?

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Would need to know which Board youre referring to either the main or the signal. You can go to the link that I am posting and leave them an email with your model number and what board youre looking for. The parts are discontinued but they have alot of sources and they also provide free tech support. Heres the link.

Posted on May 17, 2008

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I have a 65''hdtv philips i just moved and found some of the liquid from the blue light on the board. i blew a fuse i just need to figure out wheather it is a 5 amp or .5 amp any ideas

It should be marked on the end of the fuse in very small letters and on the top of the circuit board--also on top of the board will be a location number for it---Give me the exact model number and the location number and I will try to locate the value and part number.

You understand the liquid is Glycol and very toxic?

It will damage and short any parts it gets on and only water will remove it. If you get it off wear rubber gloves and do not get any on your hands etc--If replacing the fuse lets the set work--

You have 2 choices---remove, drain and reseal the leaking tube or cut a piece of cardboard and insert it above the boards but under the tubes to stop any liquid from getting on the boards.

If enough glycol leaks out the picture tube will go bad--it is in a sealed area and keeps the face of each tube cool.


IF this information helped you rate this solution as I do this here for free.


Dec 11, 2009 | Televison & Video

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This model TV has a gasket on the red picture tube that faces down. The coolant leaks from between the picture tube and the lense assembly. When this happens the red tube over heats and shorts out internally and usually cracks the glass.You will probably find coolant all over the circuit board if you open the back panel of the TV.
Call a good TV Tech to repair this. It will cost over $500 if the picture tube is still available.

Jul 30, 2009 | Panasonic PT-53WX53 53" Rear Projection...

1 Answer

Coolant is leaking onto circuit board and shorting it out

Glycol leaks can be a problem. How bad is the leak is it dripping on the boards. This stuff that s leaking is called glycol conductive anc corrosive. keep the set upluged. The seals in the crts have failed. they would have to be replaced. Very involed repair. it involves removing the tube and removing the glycol removing the seal cleaning the tube replaceing the seal refilling the tube putting the tube back in and aligning. at the shop such a repair is about 2 to three hours..if THE GLYCOL has leaked on the board then the board could have been damaged. AT this point you have to ask if it is worth it. always get a profesional to do this type of repair. i dont say this often but this is not a fix it yourself

Mar 18, 2009 | Sony Televison & Video

1 Answer

Picture tube gel leak

The best way to clean it is to remove the board completely and wipe up as much as possible, then use qtips with rubbing alcohol to remove the left over residule the alcohol will dry quickly, but still allow the board to air day a full 24 hrs before reinstalling it in the TV.

Aug 16, 2008 | Televison & Video

1 Answer

Toshiba 50H81 Power but no picture or audio

its possible that flood leaked on board from a tube leaking.
clean the area and scrape the burnt area really good so that it won't conduct. then make a jumper from some small wire to the areas you need. check tubes on the bottoms of the metel areas not the crt for something wet... if this fixes your problem then cover your board with a plastic or foam sheet so that it drains forward away from the board. also when you find what tube it is, you may want to ask ways to fix it or how to keep it from leaking.
but if its not a leaky tube then you may have had lightning or power surge. may want to go ahead and check all parts connected to that area for a short. just to make sure there isn't another problem before you start it up.
good luck let me know.

Apr 16, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

I have a Samsung projection screen television and when I moved it some liquid came out of the blue picture tube. I believe the fluid got on the circuit boards and caused it to short out. I tried to dry it...

Best case scenario, The blue crt could be fixed and refilled, and the board only burnt a trace on the board, a chip or resisitor or the like. I worked on televisions for a couple years in a small shop and had seen exactly this problem. We replaced the board and crt, lined (converged) it all up, and the cost was near $300. Probaly a good deal higher now. You could call the local repair shop and run those two ideas past them and ask what they would charger to do that specific work.

Mar 31, 2008 | Televison & Video

1 Answer

Need new green picture tube

You dont need a new tube. What you need is to repair the seal on your old tube and replace the CRT coolant fluid. There is a coolant chamber attached to the tube with long bolts with springs on them that contains coolant to prevent your tubes from getting hot. Yours may just need tightening, but I would replace the seal just to be safe as thecoolant can and will destroy your circuit board if its allowed to continue to leak on it.

Jan 15, 2008 | Samsung HCL4715W 47" Rear Projection...

1 Answer

Mitsubishi 60 inch projection

They are not BULBS by any stretch of the imagination. They are CRTs (Cathode Ray Tubes, also known as "picture tubes," and each of them are small television screens, in essence), which are optically enlarged for projection onto the back of the front screen. Don't be tempted to think that you will merely be able to replace a "bulb" and have everything work!

Although you will be able to replace all of the components on the PC board if necessary (they all remain available), and may be able to fix the coolant leak that caused the failure, the CRT may have overheated. Considering the advanced age of the television, the tubes are likely already somewhat burned-in. Best to just dispose of the set.

Oct 01, 2007 | Televison & Video

1 Answer

No picture, no sound

First thing to check, would be that there is no oily liquid or residue around or on the printed circuit boards underneath where the picture tubes are. If there is, one or more of the tubes are leaking out the coolant and the seals will need to be repaired as well as the board, if it is not beyond repair. If that does not work, check out the power supply voltage . Check to see if the horizontal output transistor is shorted, or that the convergence Ic's are not causing the set not to start up. Good Luck

Jul 15, 2007 | Hitachi 53FDX20B 53" Rear Projection...

1 Answer

TV won't come on!

Most likely, this is a problem with the convergence board. The convergence amps (STK392-040 x 2)are internally shorted. These can be replaced or the whole convergence board can be replaced. It's cheaper to replace the amps, but more convienent to replace the board (especially for the less electronically inclined!! :) Also, this could be from a leaking CRT. In CRT projection televisions, the red, green, and blue tube are filled with coolent (glycol). These 42" models are very bad about the tubes leaking (Akai and Samsung models)and are infamous for destroying the CRT driver board connected to the bottom of each tube. When this happens, the protection circuit kicks in and will not let the television start up. *PLEASE, FOR YOUR OWN SAKE, DO NOT FOLLOW THESE NEXT STEPS IF YOU HAVE NO UNDERSTANDING OF ELECTRONIC EQUIPMENT!!!! There are four screws and three snap clips that hold the bottom on. UNPLUG THE TELEVISION, remove the screws and pull bottom outward to remove. The bottoms of the three tubes should be visible. DON'T TOUCH THEM!! Now look under each tube. If one is leaking, there will be a wet spot (or sometimes a puddle!) underneath the tube. This will have to be serviced by a TV tech. Hope this helps...

Jan 26, 2007 | Akai PT4799HD Rear Projection Television

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