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Sony Laptop With Distortion Display Repaired
Customer walked into my workshop with his Laptop and the complaint was distortion display at the left side of the screen. After producing token to the customer for the laptop repair, I have started my diagnosis.
Laptop make is Sony model No. is SVT131A11W.
Turning the Laptop On I found the display as shown in the below photo:
Probable cause of this type of fault symptom are:
1. LCD Panel.
2. LVDS cable and related parts.
3. Very less probability is Logic Board.
So now it is time for troubleshooting. First I have to dismantle the screen panel:
On visual inspection of the panel screen area, it seem ok without any physical damage.
Checked LVDS cable connector on panel was also seem ok. (Though I have doubt about the cable because this screen has been replaced by some other service provider about six month back, that I come to know by the date mentioned on backside of the panel and cable connector also looks like modified.)
I have removed the cable form the panel and cleaned with IPA and refit the cable and connector. After this process I have connected the power to laptop. On powering up I found the problem was still the same. I have wiggled the cable a little bit to confirm the loose connection but no effect on the screen.
So now it is time to open the base part of the laptop and check the connector on motherboard.
Removed the LVDS connector and this also cleaned by IPA
After cleaning the connector we refitted it. Now again I have powered the laptop and see the result.
Display distortion bar was gone. While fitting of this cable I feel that the connector bonding with the LVDS socket on the motherboard is a bit loose and it can be easily come out when we remove the tape from the connector which is used for holding the connectors firmly to each other.
So I have decided to use instant glue on the edge of fitting of both the connector.
So I have applied the glue very carefully with the help of the needle pin so that the glue can hold the connectors from the outside.
After this process I reassembled the laptop and powered it On again-see the result below:
And put under the burn-in test for two days and it is now ready for handover to the customer.
This article was prepared for you by Yogesh Panchal who works as a Computer Hardware Engineer in Mumbai India.
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Note: You can check his previous repair articles in the link below: