Question about Toshiba 65HT2U 65" Class Full HD LCD HDTV

1 Answer

Power Supply Issue - Green LED ON..no power up

I have a Toshiba 65ht2u. When I plug it in, the Green LED lights on, but no response when I press the power button. I checked the voltage outputs on the power supply. 5V is good but no 24V. I did this was all connectors disconnected from Psupply. Is that correct or should i be checking voltages with all boards connected? Also, is there a service manual available for this model? Thanks in advance!

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  • Joe Stiene Nov 02, 2012

    Is there a schematic available somewhere that I can use to troublshoot the 24 volt circuit? I did disconnect the power inverters as well as the main board from the power supply and it is reading 0 volts on the 24V outputs on the connectors. The only voltage I am getting is the 5V.

  • francoise cleofas
    francoise cleofas Nov 03, 2012

    ok, i'll try to find diagram for that particular model so it can help you to diagnosed.

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  • Toshiba Master
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Tried to disconnected the 24v supply connectors going to the power inverter board which may the cause of voltage drop. after you disconnect then if still no output 24v dc coming from the power supply board the cause will be bad power supply board. check for an open resistance or bad regulators going to the 24vdc out. by the way you should connect all the connectors going to the main board to turn on the processor and the inv_on voltage going to the inverter board.

Posted on Nov 02, 2012

  • Joe Stiene Nov 02, 2012

    I did disconnect the inverter boards as well as the main board. The power supply was reading 0v at the24v pinouts on the connectors. I did get 5V output readings but that was it...also...is there a schematic available that I can use to troublshoot the 24volt circuit?

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SOURCE: I have a Toshiba 1415 S173 laptop I'm working on

I agree with micromend on the clone power supply. It sounds like perhaps the voltages aren't right or the wave form is messing up the power parts of the laptop.
I dont necessarily agree about the cmos battery but then Toshiba could be different then the ones I have used in the past. I havent tried it lately but you used to be able to run computers with no cmos battery at all. it just meant you had to redo the date and any custom bios changes at boot up. Please clarify this micromend. You cant boot a toshiba with no cmos battery?
I have a bad battery in one of my old compaqs and it still works. just have to set the date whenever I boot it up. (I been lazy to take it apart despite having piles of these batteries laying around lol)

Posted on Mar 14, 2010

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3) When releasing the Power button and the Stop / Reset button (regardless of order), the printer will move into a
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This sounds sucky, but you may have a power-supply issue. Especially if you have had to repeatedly press the power-button. If the laptop is new, call Toshiba and see if it's under warranty. If not, find a local computer tech to test your power-supply. This problem is less common nowadays, but still an issue for some!

Hope this helps!

-- RT

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