Hey guys, I want to check the led strips of a TV, and I would

>>1209151
to check white leds (just see if they work/glow dimly) they need a forward voltage of ~3V each

see how many are in series (there may be parallel strings of series leds) and multiply by 3 to get the voltage to make them glow

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>>1209156
Well, the screen has stopped illuminating but there's audio and some subtle images. That's why I believe that one LED is dead. My idea is to identify the dead one and remove it to close the circuit again.

Pic related.

>>1209151
The strip will drain about 0,6 to 1,2 Ampere per meter depending on how many LEDs it has. Let's say you have a 40 inch TV, thats makes something like 3 meters. At 3 Ampere your average 9V battery (~600mAh) will last 12 minutes until it's dead.

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>>1209166
nevermind, didn't read your question properly. thought you wanted to power something like pic related with your battery.

>>1209163
Those LED's would be in parallel, not series. They are not christmas lights, a dead LED will not kill the entire strip. Put a meter on the power line going to the strips, discover that there is no voltage present, and move on.

>>1209189
>Those LED's would be in parallel, not series
Are you sure of this?

https://www.youtube.com/watch?v=eEJoPCa7Kt0

>>1209189
The wiring shows they are in series.

find the dead led with a metre, then bridge it or put a 5 diodes across it.

You want to drop the voltage to prevent over working the other leds, if that was the issue.

>>1209364
You can't check continuity with LEDs like with an incandescent. You need a multimeter with a diode checker.

>>1209371
you check the leds with a metre, as i said. then emulate the voltage drop with diodes. simple.

either the chip wont light up or you get a infinite resistance reading on the metre.

not that hard

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>>1209376
>>1209376
>metre

please stop this. do brits actually say this?

it's a meter. a fucking meter.

>>1209385
>it's a meter. a fucking meter.
Wanker.

The led tv I was playing with needed 50+ volts before the LEDs would start lighting. TVs may very.