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Windows 7: New LED Laptop Display Not displaying correctly

20 Jun 2013   #1
mohavepc

Windows 7 Professional x64
 
 
New LED Laptop Display Not displaying correctly

Replaced a Cracked LED (no not a misprint it is a LED) display on a newer Samsung laptop. the issue is that when powered on the LED does not display correctly. I have reseated and checked all the connections to no avail. I am not sure if it is a Display issue or perhaps a cable issue. Please look at the screenshots and you will see what I mean. I plugged in an external monitor and have a beautiful picture so I don't think it is the graphics proc. Image 0836 is the external and 0837 is the LED. Should I contact the seller and see about a replacement?




Attached Thumbnails
New LED Laptop Display Not displaying correctly-imag0386.jpg   New LED Laptop Display Not displaying correctly-imag0387.jpg  
My System SpecsSystem Spec
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20 Jun 2013   #2
VistaKing

Windows 7 Ultimate 32-Bit & Windows 7 Ultimate 64-Bit
 
 

Could be the LED screen itself . The cable comes with the LED replacement or are using the cable from the old screen ?
My System SpecsSystem Spec
20 Jun 2013   #3
indianacarnie

 

As VistaKing so adroitly mentioned it, could be the cable. If you've checked and rechecked all connections and its still under warranty, personally I'd ask for a replacement. I replaced a screen not too long ago and all problems I had were traced to a faulty cable. (My fault too as I had squished the cable in the hinge as I put the machine together. Replaced the poor thing and the machine is dancing in the street. Lesson learned on my part.
My System SpecsSystem Spec
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21 Jun 2013   #4
mohavepc

Windows 7 Professional x64
 
 

Yes drivers are updated, Cable is original but I am ordering one as a cheap test. no word from the seller yet but we will see. this customer is wanting it done asap of course. sucks being in a small town. the nearest part is 250 miles away and they only ship post. well they ship ups too but for a huge cost.

*edit*
Seller has asked me to ship it back for testing. I will most likely order another one from a different supplier as I have had issues with this company before. once the new cable and LED/Lcd arrive I will update or mark as solved.
Thanks
Herb
My System SpecsSystem Spec
02 Jul 2013   #5
mohavepc

Windows 7 Professional x64
 
 

ok "New Cable", "New LCD" and still the same issue. I'm stumped unless the motherboard is toast. but if so why is the output to an external screen so perfect? any Ideas"

*edit*
It should be noted that the display on Both "new" screens looks like color separation or 8bit color without a hard drive, cd-rom/dvd, and 2GB memory. The Bios screens look just as awful on the led/lcd and fine on an external.

*edit 2*
New drivers direct from Samsung, No difference. I am at my whit's end.


Attached Thumbnails
New LED Laptop Display Not displaying correctly-imag0405.jpg   New LED Laptop Display Not displaying correctly-imag0406.jpg   New LED Laptop Display Not displaying correctly-imag0407.jpg  
My System SpecsSystem Spec
02 Jul 2013   #6
PeaB4YouGo

Microsoft Windows 7 Home Premium 64-bit 7601 Multiprocessor Free Service Pack 1
 
 

check the plug on the vid card. There may be a pin not in use by the external monitor that the LED uses that is bent. Once you've ruled out the cable, that's the next thing to look at.
My System SpecsSystem Spec
03 Jul 2013   #7
mohavepc

Windows 7 Professional x64
 
 

I am using the vga plug on the side of the laptop for the external so no it's not the same plug. I will look at the plug in a little bit.

*edit*
looked at plug at looks fine. no bent pins and no broken solder points. checked with a multimeter and there is connectivity between pins and opposite side of Mobo. *sigh* looks like a mobo after all. she could have bought a new pc by now.
My System SpecsSystem Spec
10 Jul 2013   #8
mohavepc

Windows 7 Professional x64
 
 

Well Now I am Truly stumped. New Mobo, New Cable, New LED/LCD, New case (old was bent), new Keyboard/Mobo mount (yes bent on a corner where it hit the ground). New mobo means new Vid chip and i5 processor. (as they are soldered on not in sockets).

SAME FREAKING ISSUE and a few other choice words later.
I don't know I am at a total and utter loss. Hard drive makes no diff as I tried booting without the drive using a Linux cd. Memory makes no diff as I have changed that out to with two test sticks 8gb (also tried a single 2gb).
My System SpecsSystem Spec
11 Jul 2013   #9
alphanumeric

Windows 10 Education 64 bit
 
 

I'm thinking its a connection issue. The cable to the monitor may not be connected correctly to the motherboard header. Please don't take this the wrong way as I don't know you or how tech savvy you are, but how much experience do have in doing these type of repairs? I ask because there is a trick to latching and unlatching some of the motherboard cable headers. A lot of them have a little bar you raise to release the cable and then lock it in again. Others have two small tabs on the ends you move to release the cable. This makes them zero insertion force type connectors. If you don't know how these connectors work you end up pulling on the cables to disconnect them and then pushing hard on them to reinsert them.
My System SpecsSystem Spec
11 Jul 2013   #10
mohavepc

Windows 7 Professional x64
 
 

Quote   Quote: Originally Posted by alphanumeric View Post
I'm thinking its a connection issue. The cable to the monitor may not be connected correctly to the motherboard header. Please don't take this the wrong way as I don't know you or how tech savvy you are, but how much experience do have in doing these type of repairs? I ask because there is a trick to latching and unlatching some of the motherboard cable headers. A lot of them have a little bar you raise to release the cable and then lock it in again. Others have two small tabs on the ends you move to release the cable. This makes them zero insertion force type connectors. If you don't know how these connectors work you end up pulling on the cables to disconnect them and then pushing hard on them to reinsert them.
I won't take it the wrong way because as you say you don't know me. I have a computer repair shop in a small town in Arizona. We are the only one out of 8 that does laptop repair. I have been doing computer repair since 1985 and I quite understand zif connections. this laptop is using standard albeit small 26 or 28 pin connector on the mobo end and a standard flat manifold on the led/lcd side with the stupid sticky tape style lock, they are definitely not zif connectors.

What's bugging me is that 2 different screens, one different cable and one different motherboard and still this funky issue. Looks like crap on the native screen and is bright and clean on an external monitor pugged into the vga output on the laptop. Bios screen, Linux disc or windows makes no difference. Drivers for windows are latest from Samsung but that should have zero effect on the bios or Linux screens. (Not the bios itself unless two different mobos have the same bios issue).
My System SpecsSystem Spec
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 New LED Laptop Display Not displaying correctly




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