Here's the [https://download.lenovo.com/pccbbs/mobiles_pdf/tp_x1yoga_x1carbon_hmm_en.pdf|hardware maintenance manual] for the laptop.
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Here's the [link|https://download.lenovo.com/pccbbs/mobiles_pdf/tp_x1yoga_x1carbon_hmm_en.pdf|hardware maintenance manual] for the laptop.
Go to p.41 to view the procedure for how to do an LCD test. Do this when the display is normal and check if the test is OK or not. Also ''do not'' touch the laptop once the test has started and until it has been completed, just to see if the problem occurs by itself or it is related to movement/vibrations caused by the user.
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Do this a few times just to make sure.
If the test appears to be OK then run it again and try the following:
Move the screen slowly back and forth and check if it occurs. If so apply gentle pressure on and off to the left hinge and then also on the lid cover at the bottom approx. 1/3 →1/2 of the lid width from the left hand side (when viewed from the front) and check if you can make the problem occur. The video cable goes from the motherboard through the hinge and onto the LCD panel and sometimes the cable can be damaged as it passes through the hinge or there may be a loose connection on the LCD panel, although the technician would have checked the LCD connection when replacing the LCD panel.
If you can't determine exactly where the problem is then on p.96 it details the procedure to remove the LCD panel from the laptop.
This will allow you to inspect the cable for any damage, the video cable connection at both ends and also to change the LCD panel.
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If you wish to change the LCD panel here's the [https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x1-carbon-7th-gen-type-20qd-20qe/20qd/parts/display/compatible?linkTrack=Caps%3ABody_SearchProduct&searchType=4&keyWordSearch=X1%20Carbon%207th%20Gen%20-%20%28Type%2020QD,%2020QE%29%20Laptop%20%28ThinkPad%29%20-%20Type%2020QD|parts list]¹ that may help.
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If you wish to change the LCD panel here's the [link|https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x1-carbon-7th-gen-type-20qd-20qe/20qd/parts/display/compatible?linkTrack=Caps%3ABody_SearchProduct&searchType=4&keyWordSearch=X1%20Carbon%207th%20Gen%20-%20%28Type%2020QD,%2020QE%29%20Laptop%20%28ThinkPad%29%20-%20Type%2020QD|parts list]¹ that may help.
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Click on ''Select Commodity → LCD panels (9)'' to find the part numbers for all the LCD panel types that can be installed in the laptop. Usually the part number for the LCD panel can be found somewhere on the back of the panel itself, if you wish to verify that you're getting the same one as you have now, as some are touchscreen, non touchscreen, have different [https://pcsupport.lenovo.com/ag/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x1-carbon-7th-gen-type-20qd-20qe/20qd/solutions/ht104457|resolutions] e.g. FHD or UHD etc.
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Click on ''Select Commodity → LCD panels (9)'' to find the part numbers for all the LCD panel types that can be installed in the laptop. Usually the part number for the LCD panel can be found somewhere on the back of the panel itself, if you wish to verify that you're getting the same one as you have now, as some are touchscreen, non touchscreen, have different [link|https://pcsupport.lenovo.com/ag/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x1-carbon-7th-gen-type-20qd-20qe/20qd/solutions/ht104457|resolutions] e.g. FHD or UHD etc.
If the LCD video cable is the problem click on ''Select Commodity → Cables Internal (6)'' to find the Cable coax part numbers. The part number is usually on the cable as well if you wish to verify.
Search online for the applicable to your particular model ''part number only'' to find suppliers that suit you best.
¹ The parts list is for an X1 Carbon 7th Gen Type 20QD model and the part numbers for the Type 20QE model as far as the LCD panels and LCD video cables are concerned, are the same. (I didn't check the rest of the parts). The Type number (MT) can be found on the product info label on the bottom of the laptop.
Hi @jennyferreiras
You could just be unlucky.
Here's the [https://download.lenovo.com/pccbbs/mobiles_pdf/tp_x1yoga_x1carbon_hmm_en.pdf|hardware maintenance manual] for the laptop.
Go to p.41 to view the procedure for how to do an LCD test. Do this when the display is normal and check if the test is OK or not. Also ''do not'' touch the laptop once the test has started and until it has been completed, just to see if the problem occurs by itself or it is related to movement/vibrations caused by the user.
If the test appears to be OK then run it again and try the following:
Move the screen slowly back and forth and check if it occurs. If so apply gentle pressure on and off to the left hinge and then also on the lid cover at the bottom approx. 1/3 →1/2 of the lid width from the left hand side (when viewed from the front) and check if you can make the problem occur. The video cable goes from the motherboard through the hinge and onto the LCD panel and sometimes the cable can be damaged as it passes through the hinge or there may be a loose connection on the LCD panel, although the technician would have checked the LCD connection when replacing the LCD panel.
If you can't determine exactly where the problem is then on p.96 it details the procedure to remove the LCD panel from the laptop.
This will allow you to inspect the cable for any damage, the video cable connection at both ends and also to change the LCD panel.
If you wish to change the LCD panel here's the [https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x1-carbon-7th-gen-type-20qd-20qe/20qd/parts/display/compatible?linkTrack=Caps%3ABody_SearchProduct&searchType=4&keyWordSearch=X1%20Carbon%207th%20Gen%20-%20%28Type%2020QD,%2020QE%29%20Laptop%20%28ThinkPad%29%20-%20Type%2020QD|parts list]¹ that may help.
Click on ''Select Commodity → LCD panels (9)'' to find the part numbers for all the LCD panel types that can be installed in the laptop. Usually the part number for the LCD panel can be found somewhere on the back of the panel itself, if you wish to verify that you're getting the same one as you have now, as some are touchscreen, non touchscreen, have different [https://pcsupport.lenovo.com/ag/en/products/laptops-and-netbooks/thinkpad-x-series-laptops/thinkpad-x1-carbon-7th-gen-type-20qd-20qe/20qd/solutions/ht104457|resolutions] e.g. FHD or UHD etc.
If the LCD video cable is the problem click on ''Select Commodity → Cables Internal (6)'' to find the Cable coax part numbers. The part number is usually on the cable as well if you wish to verify.
Search online for the applicable to your particular model ''part number only'' to find suppliers that suit you best.
¹ The parts list is for an X1 Carbon 7th Gen Type 20QD model and the part numbers for the Type 20QE model as far as the LCD panels and LCD video cables are concerned, are the same. (I didn't check the rest of the parts). The Type number (MT) can be found on the product info label on the bottom of the laptop.