My LN40A500T1F has a red flashing light and it would not turn on. Now there is no light at all

I hope this will help you :)
* Green Power light flashes- The printer is receiving a print job, replacing an ink cartridge, charging ink, or cleaning the print head.
* RED paper light is On- If the CD/DVD try guide is open, close the CD/DVD tray guide, load paper, then press the paper button. Your paper ran out or multiple sheets loaded at the same time . Load paper and press the paper butoon to resume printing.
* RED paper light flashes- Paper is jammed in the printer. Press the paper button to eject the jammed paper. If the light is still flashing , open the cover and remove all paper, including any jammed or torn pieces. Then reload paper and press the paper button to continue printing.
* RED Ink Light Flashes - One or more cartridges are low on ink. Check the message that appears on your screen to determine which cartridge is low, or follow the instructions in " Checking the Ink Supply". Make sure you have a replacement cartridge.
* RED Ink Light is ON- One or more cartridges are out of ink or not installed. If you have just installed a new cartridge, it may be incomaptible with the printer or incorrectly installed. Reinstall it or replace it with the correct cartridge
* RED Ink and RED paper lights flash alternately- The CD/DVD tray guide was left open when you turned on the printer or when printing on paper. Just simply close it/
* Green Power Light is Off; RED paperand RED Ink Lights flashing- Paper may be blocking movement of the print head. Turn off the printer, then open the cover and remove any jammed paper or other foreign objects. Turn the printer back on again. Or it may have an internal error. Turn off the printer, wait a few seconds, then turn it on again.

You may have main board problem that is not sending the signals to turn on the main power supply, but you need to look at the power supply PS_ON pin to see of it has 3.3~5vdc on that pin, if it does then the problem is in the power supply which you need to look for blown caps with domed tops.
See the boards here: http://www.shopjimmy.com/catalogsearch/result/index/?q=SAMSUNG+LN40A500&stock=all

Please read my guides before trying to DIY repair.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

Hi,
Red light flashing on tv indicates that tv got some problem and shifted to protection mode to avoid further damage.
If Lamp light is flashing on tv then check lamp that would be dead or broke, replace lamp to solve tv problem.
If standby red light is flashing on tv then let me know how many times it is flashing after 3 seconds long pause to provide you helpful info.
Thanks.

Follow all 6 videos and your PS3 will work again. and it wont cost you $150 with sonys Refurbish program

good day i think theres a parts that links to the main board is shorted. causing not to on your tv. you need a qualified technician to fix that problem,

Hello,
Count how many times the red light flashes and how many the green light flashes.If its 1 green and 1 red thats water problems.If 2 flashes of red light check filter is clear and pump is free to turn.

Hope this helped.

Plantronics Explorer 320
Indicator lights: Blue Light Flashing.

TheBlue light flashing indicates that your headset is working normally. There is no way to turn it off without turning off your headset.

Headset Status Headset Indicator Light

Powering on: Blue light flashes.

Powering off: Red appears and goes off.

Charging battery: Red solid light.

Low battery Red flashes.

Pairing mode: Blue/red flashes for 120 seconds.

Missed call: Purple flashes. Double press the call control button to cancel.

Ringing: Purple flashes. Briefly press call control button to answer the call. Press call control button for 2 seconds to reject the call.

Here's the link to your user guide:
http://www.retrevo.com/d/df/explorer300series_en.pdf?doc=178a4266e3e80dd257e740b75b59b3ad&ts=1265516774335

If you found this information helpful, please give me a big thumbs up when you rate my answer. Thanks!

The specific type of hardware failure can be determined by a "hidden" error code
Turn the xbox 360 on, and wait till the 3 red lights are flashing.
Press and hold the sync up button (the small white one), while holding that button press the eject button.
The LEDs will now blink the first number in the code (as described below).
Release the eject button and press it again.
The LEDs will now blink the second number of the code.
Release the eject button and press it again.
The LEDs will now blink the third number of the code.
Release the eject button and press it again.
The LEDs will now blink the forth number of the code.
Release the eject button and press it again.
The LEDs will go back to the 3 red flashing lights.
You should be able to determine the difference between the 3 flashing lights and the error code lights by the rate in which they flash.
Here is how you interpret the LEDs to get the code number:
All four lights flashing - 0
One light flashing - 1
Two Lights flashing - 2
Three lights flashing - 3

Once you get this code, go to: http://forums.xbox-scene.com/index.php?showtopic=484726
To get the reason for the code.

The flashing "boat" in the middle of the viewfinder just means the button battery is dead. Camera will still work. It's the little pull-out light grey plastic thing that's next to the heel of your right hand when you're using the camera normally. You need a CR2025 cell.

http://www.tvrepairdoctor.com