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Power is on but no signal output to the screen

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Check you havent accidently switched your pc to external monitor,on mine Fn/F5 toggles between screen and monitor also if you have a port try an external monitor first

Posted on Apr 04, 2011

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The following applies to Acer Laptops. You did not specify the brand of laptop you had. If your laptop is not Acer, the specific keys mentioned may be different and you should adjust accordingly.

If the power indicator is lit but nothing appears on the screen - The computer's power management system automatically blanks the screen to save power. Press any key to turn the display on.
If pressing any key does not turn the display back on, check the following....
1. The brightness level might be too low. Press Fn and the right cursor key to increase brightness level
2. Display device might be set to an external monitor. Press Fn and F5 to toggle to the internal display
3. Backlight might be turned off. Press Fn and F6 to turn on the backlight.
4. If the Sleep indicator is lit, the computer is in Sleep mode. Press & release power button to resume.

Posted on Apr 04, 2011

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1 Answer

"no signal" showing on tv screen


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2 Answers

I have connected my Toshiba laptop to a benq PB6210 beamer but cannot get presentation on the screen. I need help


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1) Turn off the BenQ power, before connecting your VGA cable to the Toshiba laptop.

2) Once your laptop recognises the BenQ unit, you then need to tell your laptop to send an output signal to the BenQ - you do this by pressing your 'screen output' button (this is usually one of the function keys and you may need to hold the key for 1sec). The output function key can choose either single VGA output, or both laptop screen + VGA output.


"If this has helped you, please rate this solution"

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Tv Model no HTF27R11 SCREEN LUCKED


your problem is in blue video output circuit.

as you are seeing lines with blue  color

those lines are called retrace lines.

please check

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  • loose crt base or crt base connector.
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  • at last but rare cases crt weak.
  • hopr this will help

good luck

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1 Answer

Tv Screen Problems


as you see green screen with lines through it

lines you are seeing is called retrace lines.

the problem is due to green video output section failure

please check the followings as given

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  • components in green video output circuit
  • crt base loose.
  • connector loose in video ckt.
  • signal from signal processor to  green video section is absent.

hope this will help.

good luck.

 

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