Comments on: Screen inverter replacement. Fixing laptop backlight problem.

By: cj2600

cj2600 — Thu, 02 Feb 2012 16:18:33 +0000

@ s44xD,

I just replaced my backlight inverter after it and now the display works again…. works for only up to 5 minutes from booting the system. does it mean i replaced my old inverter with just another broken one?
I am at a total loss. what to do now?

Did you buy a used inverter or new one? It’s possible your new inverter is defective.
Did you notice any change after replacing the inverter? Maybe the screen stays on for longer time?

In short, here’s what could be wrong with your laptop:
1. Your new inverter is defective.
2. The backlight lamp is failing.

I would try replacing the inverter board again.

By: s44xD

s44xD — Wed, 25 Jan 2012 13:19:01 +0000

Hi there! I just replaced my backlight inverter after it and now the display works again…. works for only up to 5 minutes from booting the system. does it mean i replaced my old inverter with just another broken one?
I am at a total loss. what to do now?

By: cj2600

cj2600 — Sat, 21 Jan 2012 02:31:36 +0000

rich,

is there any other issue besides the LCD/backlight and inverter board that would cause the LCD to be very dim?

Could be faulty video cable or motherboard failure. It’s hard to tell what’s going on without testing the laptop with KNOWN GOOD parts.

By: cj2600

cj2600 — Sat, 21 Jan 2012 02:23:26 +0000

@ Dan M,

My laptop LCD looked like it was broken glass, but externally it wasn’t. Just the picture has blacked out over a portion of the screen. Thought it was the actual LCD, but when hooking up an external flat panel, I noticed a couple of lines in the picture. Could this be a result of a bad inverter or should I be looking at something else?

If you still can see a part of the laptop screen it’s definitely not the inverter related problem.
It’s hard to understand what’s going on without looking at your screen. Can you take a picture, upload it somewhere and send me a link?

By: rich

rich — Sun, 15 Jan 2012 03:26:56 +0000

I am attempting to repair a toshiba laptop where the LCD screen is very dim. I have replaced the entire LCD which included a new backlight and the inverter board…the issue remains. I suspect the inverter board I rcvd from ebay is not a compatible part but is there any other issue besides the LCD/backlight and inverter board that would cause the LCD to be very dim?

By: Dan M

Dan M — Sat, 14 Jan 2012 14:55:56 +0000

My laptop LCD looked like it was broken glass, but externally it wasn’t. Just the picture has blacked out over a portion of the screen. Thought it was the actual LCD, but when hooking up an external flat panel, I noticed a couple of lines in the picture. Could this be a result of a bad inverter or should I be looking at something else?

By: cj2600

cj2600 — Thu, 12 Jan 2012 06:34:25 +0000

@ Ram,
Sorry, cannot help you with LCD TV repair. I’ve never done it before.

By: Ram

Ram — Tue, 10 Jan 2012 11:53:36 +0000

Hi, my question is about an LCD screen (not a laptop per se). It is a sony LCD TV. The power supply unit and one of the inverters had transistors blown out due to a power supply surge. I am in Egypt where the current is 220v. I can order parts from ebay from the US but I know the power supply there is 110v. When I do that, I assume I have to connect the power supply via a transformer (220–>110) but do I have to also change BOTH inverter panels (not just the one that is blown out) and would the rest of the screen components get the right voltage power supply?

By: cj2600

cj2600 — Mon, 02 Jan 2012 07:53:21 +0000

@ Ken,

Screen backlight works but the screen is white. Replaced the LCD Screen and the cable without any luck. If I connect to an external monitor, the image is fine.

If new LCD and cable didn’t fix the issue, probably this is motherboard related failure.

By: Ken

Ken — Sat, 31 Dec 2011 17:30:34 +0000

Screen backlight works but the screen is white. Replaced the LCD Screen and the cable without any luck. If I connect to an external monitor, the image is fine.
thanks