Semi burnout backlight?

S

switchg3ar

Limp Gawd
Joined
Jan 1, 2007
Messages
143
It didn't want to turn on, when it did this is what I saw. Power cycled it after a few minutes and it was fine.

 
Google shrouded in mystery.

(Agreed -- that is not normal from I've seen. It might be going...)
 
Are back lights self replaceable if you know your way around computers? Always wondered that.

Pretty sure LCD's have no dangerous capacitors or anything inside =)
 
Malakai said:
Are back lights self replaceable if you know your way around computers? Always wondered that.

Pretty sure LCD's have no dangerous capacitors or anything inside =)
Click to expand...

Oh yes they do, what do you think power your 128 watt LCD?
 
I have six months of warranty left, and the monitor is 2.5 years old. I just tried it again and everything seems fine. This happened twice today where I turned it on from a powered off state and the blue light would come on but the screen did not. The second time this happened only half the screen came on.

I think I will just send it in anyways. Here is another shot I took.

 
CptFalcon said:
Oh yes they do, what do you think power your 128 watt LCD?
Click to expand...

My mistake. Didn't realize it was that high power, this monitor only draws 30 watts according to spec.
Is it the backlight or manipulating the crystals that requires that much power?
 
Malakai said:
My mistake. Didn't realize it was that high power, this monitor only draws 30 watts according to spec.
Is it the backlight or manipulating the crystals that requires that much power?
Click to expand...

Well my monitor uses about 68 watts at full brightness. However I do know that all LCD's have their power supplies built into the unit and if you do want to replace a bulb or do anything that requires opening the monitor you need to wait at least a half hour for the charge in the capacitors to recharge.

BTW the 128w thing was something I guesstimated.
 
Not all LCD's have the transformer built into them, my last few didn't.

To be honest, if you have warranty left it would be pretty silly to void it attempting a home repair - send if off. Yes, it may be inconvenient for a couple of weeks, but do you have another monitor you can use in the meantime? I kept one of my old 17" TN's just for that very reason.
 
I think the only thing dangerous in a LCD might be the high voltage ballast/inverter used on the backlight. Though I'm pretty sure these don't hold much charge, as they're high voltage not high current. I want to say I've touched the ones inside laptops accidentally and I'm still typing away till this day (correct me if i'm wrong on this)
 
If you are a tech, familiar with soldering, etc, I'm sure you could replace it yourself. Cold cathode tubes. It might even be a bad connection/solder joint and the bulb is actually fine.

I think you can find replacements at Digikey or Mouser type suppliers.
 
You must log in or register to reply here.
Back
Top