Comments on: How to test LCD screen inverter in a laptop

By: cj2600

cj2600 — Thu, 02 Feb 2012 21:07:22 +0000

cole,

My laptop screen wont display at initially, but after 30 to 45 minutes its display normal. What went wrong ? any idea?

How about image on the external monitor. Does it appear fine as soon as the laptop is turned on?

By: cj2600

cj2600 — Thu, 02 Feb 2012 16:59:12 +0000

@ Kevin,

I thought I had a bad inverter on my 6 year old dell Inspiron b130.
So I ordered a new one and after replacing the old one my screen was working again and for a few hours that I worked on laptop, it was just great. As I shut the laptop (just folded shut) as I always do, next morning I had black screen again. Any wisdom and or advice would be greatly appreciated.

Does it go to sleep mode when you close the lid?
Try this. Unplug the AC adapter and remove the battery. Now try turning it on normally. Does it have backlight now?

By: cj2600

cj2600 — Thu, 02 Feb 2012 16:31:51 +0000

@ Igor,

i dont know the right sequence wich goes to inverter,but first one mine color is blue has voltage 19v. but it is your last if we will lok on your picture. An one more wire has 3v voltage is this Ok or my motherboard is damaged. My laptop is Hp 6820s .

I cannot tell. I don’t know voltage specs for all laptops.
What is the problem? There is no image at all? Or the image is very dim? Can you get image on the external monitor?

By: cole

cole — Wed, 01 Feb 2012 03:39:36 +0000

Hi,
I read all the problem & comments above, but none the same to mine. My laptop screen wont display at initially, but after 30 to 45 minutes its display normal. What went wrong ? any idea?

sazcole

By: Kevin

Kevin — Sat, 28 Jan 2012 18:38:47 +0000

Hi,
I thought I had a bad inverter on my 6 year old dell Inspiron b130.
So I ordered a new one and after replacing the old one my screen was working again and for a few hours that I worked on laptop, it was just great. As I shut the laptop (just folded shut) as I always do, next morning I had black screen again. Any wisdom and or advice would be greatly appreciated. Thank you, Kevin

By: Igor

Igor — Thu, 26 Jan 2012 19:36:55 +0000

Hi, i dont know the right sequence wich goes to inverter,but first one mine color is blue has voltage 19v. but it is your last if we will lok on your picture. An one more wire has 3v voltage is this Ok or my motherboard is damaged. My laptop is Hp 6820s . Tnx on answer,and sory on bad english.

By: Dal

Dal — Mon, 23 Jan 2012 00:49:26 +0000

Your test method, while as good as my research has found, is not 100% reliable.
Example: failing, or intermittent inverter. Backlight lights for several seconds then turns off. Tested with lower power consuming CCFL. stayed lit = bad CCFL.
Not true – reconnected to laptop with inverter hanging loose and laptop worked perfectly for several hours. Mounted inverter and Backlight failed again.
Inverter is defective. Stress cracked trace or cold soldier failure.

By: cj2600

cj2600 — Wed, 28 Dec 2011 19:02:41 +0000

@ Fabiog,

In my case an Acer inverter for 15.4 to be used on a toshiba 15.4.
Is there a chance the acer or Toshiba one will be killed

If both inverters are identical, you can try it.
If inverters are different, I wouldn’t do it. You can damage the inverter or kill the motherboard.
I would suggest buying a new inverter. They are not expensive.

By: Fabiog

Fabiog — Wed, 28 Dec 2011 13:38:35 +0000

Is it possible to test inverter with another one with the same connectors even though different reference.
In my case an Acer inverter for 15.4 to be used on a toshiba 15.4.
Is there a chance the acer or Toshiba one will be killed

thanks

By: bitesh gupta

bitesh gupta — Tue, 27 Dec 2011 16:47:04 +0000

My laptop working good but when i put down my lcd screen on working period,windows goes on standby mode and when i active my windows a fatel error comes and laptop gone restart.what’s the problem in my laptop guide me.
thank’s…