Question about Toshiba 57HX81 57" Rear Projection Television

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Toshiba 57HX81 LED Flashes, No Power

My LED flashes but there is no power. Any suggestions?

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  • cheena2000 Dec 30, 2007

    have same problem with this model. Any suggestion?

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1 Answer

Check all pico fuses see if one is blown

Posted on Nov 02, 2007

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6ya6ya
  • 2 Answers

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1 Answer

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Check this service bulletin and test the components described, it may be the same problem.

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Rebouldin resoldering the video proccesor this is the problem or change the main bord a new !

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Have you tried another Cord with the EXACT same power specs? Remove the battery. Has the cord/charger/transformer been damaged? Has the AC jack been damaged? Due to pulling on the cord while plugged in? At the AC jack "wiggle" the plug a bit to see if the plug and AC jack are making a good connection or Loose. Sounds like a loose AC connection.

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When you connect the power adapter into the laptop, does the power LED light up? If not then - The battery adapter or the adapter's power lead or the laptop's power socket could be faulty. Check power adapter's DC plug that connects into the laptop power socket with a multi-meter, the voltage should be slightly higher than the voltage that is printed on the label on the bottom of the adapter. If the voltage is zero or way below the voltage that is printed on the label then the power adapter is faulty and needs to be replaced. If the adapter is OK then connect it to the laptop and power it up, then look at the power/battery charging LED light and wriggle the power plug in the laptop's power socket. If the power/battery LED light flashes and in a certain position this LED light stays firm, then the power socket is either faulty or it has a dry solder joint where it is connected to the motherboard. This can be repaired but it requires the laptop to be completely dismantled to get at this power socket and repair. If you cannot DIY then I suggest you get a quote first.

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1 Answer

Dead toshiba satellite laptop


If the adapter is OK thenconnect it to the laptop and power it up, then look at the power/batterycharging LED light and wriggle the power plug in the laptop's powersocket. If the power/battery LED light flashes and in a certain position thisLED light stays firm, then the power socket is either faulty or it has a drysolder joint where it is connected to the motherboard.This can be repaired but itrequires the laptop to be completely dismantled to get at this power socket andrepair. If you cannot DIY then I suggest you get a quote first.

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AC POWER LED FLASHES AFTER I PRESS POWER ON BUTTON 4 SHORT 1 LONG 3 SHORT


If the power LED flashes an amber sequence - whatever it is - the motherboard is bad. If you have to replace it, eBay would likely be your best bet - stay with 8100 models that are 750Mhz or faster - and you can probably pick up something incomplete for around $20 and do the swap yourself, as these Tecra 8100's are pretty easy to work on.

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2 Answers

I'm having trouble with my Toshiba 42HL196 TV. It won't power on. There is a flashing red light on front. I've read the manual and done everything it suggests with no success. I've checked inside the tv...


SYMPTOM: Won't turn on or intermittently won't turn on, Red LED Flashes.

CAUSE: Loss of Main Switched Power Sources. Standby power is OK.
SOLUTION: Replace Regulator IC Q820 with Toshiba Part # 23135094

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1 Answer

Panasonic PT-47WX42F does not come on light flashes 3 times HELP!


There is a service manual which should cover this model/chassis series:

Elektrotanya for electronics experts

(PDF format - free - no sign-up needed - 100% clean)

Page 11 ('auto diagnosis feature') shows a table of LED flashes and what each one means. I'd start by checking D-board (since that is power and deflection) and going from there.

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1 Answer

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that just sounds like the hard drive running, try plug an external monitor and see what happends

get back to us

regards

Nov 27, 2008 | Computers & Internet

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