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Toshiba 55L621U TV Power problem

Will not turn on even after replacing powerboard

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Chris Walker

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Posted on Mar 29, 2019

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John Cunningham

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SOURCE: i have toshiba 32HV10v need powerboard

Go to www.ebay.com Type: make and model of laptop scroll or refine search to powerboard, if nothing comes up! scroll instead so nothing is missed.

Posted on Apr 23, 2012

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bobby caesar

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SOURCE: How do I fix my lcd tv that won't turn on? It does not appear to be the powerboard.

Vizio logo is an indicator that the tv is live n changes to white that the screen is on meaning if no change to white the smps switch mode power supply board ain't switching the mother board....diagnosis is its MOSFET transistors need replacement or the smps board n ya tv will be fine

Posted on Sep 22, 2015

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I have a toshiba 55L621U it powers up to the main splash screen then cuts out after about 8 seconds. it gets 5v over to the logic board. not sure what to check next.


Check your other voltages coming out of the power board and see if they drop off when the set shuts down, all the 5 volts does is supply standby voltage and that should be there all the time even if the set is off. A suspect on this set is LED lamps in the panel but it could be other things as well

May 02, 2018 | Toshiba Televison & Video

1 Answer

How do I fix my lcd tv that won't turn on? It does not appear to be the powerboard.


Vizio logo is an indicator that the tv is live n changes to white that the screen is on meaning if no change to white the smps switch mode power supply board ain't switching the mother board....diagnosis is its MOSFET transistors need replacement or the smps board n ya tv will be fine

Sep 22, 2015 | Vizio XVT473SV 47 in. LCD HDTV

1 Answer

My Toshiba Portege M200 just stopped charging and wont even turn on? Is this the battery? Or what? The charger will be plugged in the wall and plugged in the laptop but nothing?


Try removing the battery and see if it will boot without it
Then check the caharger, charging light should be green and steady on the charger itself
If it is flickering, it meand power is not making a circuit, test charger jack with a DC volt multimeter with one probe to the outer side (earth) and one on the inner (positive). If this is ok, check the charging socket is not loose (if it is, will need replacing).

After that, suspect the power strip or charging / powerboard is dead on the motherboard

Mar 22, 2011 | Toshiba Portege M200 Tablet PC

1 Answer

My toshiba P25-S676/80 will not turn on. No


May be a bad power jack or the powercord/ac adapter may not be putting out enough power.Your powerboard may need to be replaced or even the button itself may not be getting contact to the board itself.

Jul 11, 2009 | Toshiba Satellite A60 Notebook

1 Answer

WON'T TURN ON.


Powerboard damaged, if you could not see the Led light on stanby mode it means you have no power at all.

Go ahead and replace your powerboard and your TV will be Ok

May 28, 2009 | LG 42PC3DV 42 in. Plasma EDTV

3 Answers

This T.V. won't even turn on now. It started this


Sounds like a faulty power supply. Depending on the model, size, etc. it may be easier to ship it somewhere or bring it to a store. For the most part, they run anywhere from $150 - $350 plus installation. 

If you are pretty good with electronics, comment back  with the model # and brand of your TV set, and I will look up for you a place to purchase one. However, I wouldn't reccomend purchasing and installing one yourself unless you are sure that you can handle it.

Apr 13, 2009 | Akai LCT2701AD Television

1 Answer

Power surge caused fuse to blow on initial power supply


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.

Jan 28, 2009 | Toshiba 42H81 42" Rear Projection...

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