Question about Toshiba 42H81 42" Rear Projection Television

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Power surge caused fuse to blow on initial power supply

Replaced fuse tv comes on and after about 1 min turns off but will come back on if you turn power on again. just wanted to be safe before trying it too many times and blowin a board or something. What should i look at next before i cause any damage to tv? WE can fix this with your knowledge and help. Thanks BILL

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You may need to replace the powerboard in the unit. it sounds like it might have fried already or is on the verge of it.

Posted on Jan 28, 2009

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Today my power went out for a split second and came back on I turn my TV back on it makes a high pitched whining noise and the screen wont turn on. Cant add picture but model number is MW30G71.


unplug your tv. let it sit for a good bit. 1/2 hour did your power just go out or did you have a power surge then no power. surges cause the grid to go down for a second too and that causes problems too. surge protectors are good for everything. also are you on cable? if so have the cable company check they're filters into the house may be an issue but check the tv after a half hour unplgged and then plug in and turn on normally? sometimes it needs a reset time period before the fuses inside will reset themselves.

Nov 17, 2015 | Projection Televisions

1 Answer

I turned on my tv this morning and it started smoking and of course smelling like something inside was burning. We took off the back and can see nothing that looks burnt or melted but the tv still wont...


hi,
may be ur tvs lamp side have some problem. may be the lamp over heated and burned. just open its lamp cover ann check it.
also check its power supply input point(near fuse) there is an MOV (used for voltage surge protection) is burned or not. if there is any voltage surge it will get shorted and the fuse will blow off, protect the power supply for any further damage. check the fuse also. if found open then check the MOV. insert fuse only after replacing the MOV.
ok

Dec 22, 2010 | Samsung HL-S5087W DLP TV

1 Answer

TV does not turn on by pushing the power button on TV or using the remote.


A dead unit is commonly caused by a bad main fuse (right off the AC input). A bad fuse can be caused by something as simple as a power surge or some component on the power supply could be toast. Switch mode power supplies can be a pain to troubleshoot, specifically this one. If you find a bad fuse, replace it. If the new fuse goes out. Go find yourself a replacement board. They should be cheap enough. Goodluck.

Jul 04, 2010 | Mitsubishi WD-52525 52" Rear Projection...

2 Answers

TV WAS WORKING FINE, TURNED IT OFF, THEN TURNED IT ONTHE NEXT DAY


Your tv might have a defective power supply, and/or convergence circuit. The initial cause of the problem, if it is the convergence circuit, is usualy a loose conection on one or two jumpers close to the convergence output circuits (STK392-1110), in with case this chips might need to be replaced and a pico fuse of 5A on the power supply too. I hope this help you.

Sep 24, 2009 | Toshiba 56H80 56" Rear Projection...

1 Answer

Have a Toshiba MW24F11 combo tv. Near lightning strike through surge suppressor. Will not turn on. 6.3 amp fuse blown; replace, blew again. Next step, or start looking for replacement. Set is 25...


power surges generally damage diodes and capacitors causing the fuse to blow, any reputable tv shop can repair for a fraction of replacing this set.

Sep 15, 2008 | Projection Televisions

1 Answer

Fuse Blowing Repeatedly


if you are not a tech have one check your tv,the voltage regulator is shorted and needs to be replace.this component can be found in the power supply.i do not have the part number and location as i have no schematic for this set.

good luck

May 03, 2008 | Projection Televisions

1 Answer

Blown fuse


Most likely there was a power event (surge, brownout, ect) that caused the power supply to fail in the TV causing the fuse to blow. you will need to have someone come and look at the unit and give you an estimate. If you keep putting fuses in and blowing them you could actually be causing more damage.

Mar 10, 2008 | Projection Televisions

2 Answers

Instantly blows the 5 amp fuse next to the power cord plug.


You have a short in the power supply. Look at the regulator and or rectifier diodes. These are all on th primary side of the SMPS (switched mode power supply) the secondary side if shorted shouldn't cause a blown fuse at all.

Mar 18, 2007 | Mitsubishi VS-50607 50" Rear Projection...

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