E-systems Sorrento 1 Laptop LED display screen dim/faint

[Stormcloud]

Hi, I was wondering if anyone can 'shed some light' on this problem.

 

Im fixing a laptop for a friend, an E-system Sorrento 1 (V50SI1) where it was knocked from a table & took a nasty tumble to the floor - cracking the screen quite badly.

 

I could visually see the (many) cracks but the laptop still powered up so seems its not a goner. No light behind/around the cracks or in small areas where it may be able to show - I assumed perhaps the backlight bulb had been damaged in the tumble or the inverter was also damaged....I assumed it was an LCD screen at that point as I had not checked.

 

It appears to display the image totally fine on an external monitor.

 

So, I thought well, it needs a new screen anyway so get the damaged one out (part number N156B6-L06) - that was when I realised it was an LED - no inverter, only the vid cable. Ordered a replacement for an online shop I have used in the past, confirmed with them it was an LED and was promised a compatible screen would be sent - arrived earlier today (part number LTN156AT05), which does appear compatible according to info on Laptop Adapters, Laptop Chargers, AC Adapters from Dell, Acer, Sony, HP & Compaq - Buy Online - not where I bought it, just checked info there.

 

Fitted the screen but unfortunately a very dim/faint screen on powerup - nearly black as if the inverter had failed on a LCD. Tried ajusting brightness settings via the function keys = no joy.

 

Next I thought I better check there definitely is not an inverter in it & try reseating the vid cable, so proceeded to disassemble the laptop.

 

Yep, no inverter and reseating the vid cable at the motherboard end & again at the screen end has made no difference.

 

This is the first time I've replaced an LED screen, but Im assuming if the laptop can display the image fine on an external monitor chances are it wont be a motherboard related fault...Im assuming the screen is ok (was very well packed against damage and seems to be compatible)...so all I can think is the vid cable has also been damaged but it shows no physical signs and seems strange to be damaged from a fall...

 

Does anyone have any further advice on how to diagnose or verify what Im thinking about LED screens? Would hate to think I've wasted £55 on a screen which didnt fix the problem.

 

 

Thanks in advance :)

 

 

Stormcloud

[PseFrank]

Hi Stormcloud, you may find that you can adjust the brightness of the screen by using the FN (Function) key along with either the arrow keys on the keyboard, or two of the F keys.

 

Look for small icons of the sun or something similar imprinted on the keys. If you see these icons then press down the FN key and one or other of the keys with the icons on.

 

If it's the F keys then it will probably be on keys 5 to 8.

 

Hope this helps out.

[Stormcloud]

Thanks for the reply PseFrank but unfortunately I have already tried it.

 

"Tried ajusting brightness settings via the function keys = no joy."

[timmytimt]

Thanks for the reply PseFrank but unfortunately I have already tried it.

 

"Tried ajusting brightness settings via the function keys = no joy."

 

 

I have had the same proble on a Sony Vaio with a LED screen.... I tried 3 different screens from the same person on ebay. THe first one sent me an LED screen that was pushing out opposite colors with a good backlight. THey then sent me a screen that appeared to have no back light. Then they sent me another screen with no backlight. I believe there is an inverter board type of hardware under the screen that has to be correctly sautered, and such to make the LED screen work. My suspicions lead me to believe that the screens i had gotten were not assembled correctly. I am trying a more expensive screen soon and hope that it will work the problem. DId you come to a conclusion yet?!!!!!!!!

[Plastic Nev]

For all folk having screen problems, though I have not replaced a screen personally, I have found a very good laptop repair site which may have some answers for you regarding repair and replacement of screens, have a look here=

 

http://www.laptoprepair101.com/

 

Though I can see repair tips for LCD type screens, a search of the site may find repair tips for LED screens.

Nev.

[mreid2005]

Sony's and Dells Have Fuses

 

It's been my experience, that there is a fuse just below where the vid cable plugs into the motherboard. If this teensy tiny fuse is blown. your screen will appear extremely dim, just able to make out the images. You can check this fuse with a multimeter, or even a cable tester/toner with alligator leads, just put it in continuity mode, and put a couple of tiny wires into the alligator clips in order to attempt to short either side, while the laptop is powered off (Of course)

 

I know this because I accidently blew this fuse hooking up a replacement lcd, and I didn't get the cable fully seated.

 

Anyhow, you can see a picture over at

http://nwapchelp.wordpress.com/2011/05/25/dim-laptop-led-f1-fuse-just-below-the-motherboard-connector/ not trying to violate any rules, but I have a good screenshot hosted over there.

 

good luck!