inova nt24 24 inch backlight problem

[gasinmars]

Re: inova nt24 24 inch backlight problem

so how volt it chould be?

[tom66]

Re: inova nt24 24 inch backlight problem

The way these strips work is by current drive. The current drive should be in the region of 20mA to 60mA and depending on the number of LEDs, the forward voltage will vary from 20 to 100V. However I have not found many manufacturers who publish this info.

[gasinmars]

Re: inova nt24 24 inch backlight problem

if it's 69 volt , is it good?

[tom66]

Re: inova nt24 24 inch backlight problem

I HAVE NO IDEA. Manufacturers DO NOT PUBLISH this information!

Read my post above!

[selldoor]

Re: inova nt24 24 inch backlight problem

We dont know! It might help if you can get and information from the panel
Is there a sticker on it Make manufacturer model etc

[gasinmars]

Re: inova nt24 24 inch backlight problem

so how to check the fault if it is the panel or the board?

[selldoor]

Re: inova nt24 24 inch backlight problem

Dismantle the panel and check the lamp strings

[gasinmars]

Re: inova nt24 24 inch backlight problem

i checked with another lamp and it's not working

[tom66]

Re: inova nt24 24 inch backlight problem

Lamp, i.e. a CCFL tube? Or actual LED light bar? Remember each light bar is different!

[gasinmars]

Re: inova nt24 24 inch backlight problem

i checked with another lamp and it's not working

[gasinmars]

Re: inova nt24 24 inch backlight problem

is there any other way to check this ? look i also check the output of the two pins from the inverter driver board and it shows 69 volt ? is that normal ?

[selldoor]

Re: inova nt24 24 inch backlight problem

No.

[tom66]

Re: inova nt24 24 inch backlight problem

Asking the same question will not get you any more information than we've already told you. You need to check the light bar.

[gasinmars]

Re: inova nt24 24 inch backlight problem

look i figured out what is it , inside the screen i removed the black tape on it and recognized that the cpu is damn hot , so the problem is with the board of the screen that is connecting with the cables. is that right what iam saying ?

[selldoor]

Re: inova nt24 24 inch backlight problem

Maybe - post a picture of it?

[gasinmars]

Re: inova nt24 24 inch backlight problem

the cpu of the board that is assembled to the screen (not the vedio board or powersupply)
is to hot.

[selldoor]

Re: inova nt24 24 inch backlight problem

How hot is too hot?? Picture of it might help

[tom66]

Re: inova nt24 24 inch backlight problem

look i figured out what is it , inside the screen i removed the black tape on it and recognized that the cpu is damn hot , so the problem is with the board of the screen that is connecting with the cables. is that right what iam saying ?

That's probably the T-con board, and since you have a fault with the backlight, it is probably not the fault. The fault will be with the LEDs or potentially (though quite unlikely) with the LED driver board, if the output voltage is too low.

[gasinmars]

Re: inova nt24 24 inch backlight problem

how many volts the inverter drive shoul give (output ) 12 volt?

[tom66]

Re: inova nt24 24 inch backlight problem

Do you even read the posts above, WE DON'T KNOW...