T470S FHD to WQHD Panel Upgrade - Troubleshooting Question

[htc4668]

Per the following post from markgm: viewtopic.php?t=123783 it is possible to swap out the T470S panel from FHD to WQHD so long as you swap out the video cable with an eDP cable.

I was able to successfully swap out the panel + cable using the hardware maintenance manual as a guide. However, I noticed some funky behavior and am unsure if this is due to a bad battery set and was hoping for some input:

1. The brightness function key no longer works
2. When external power is off, the screen flickers with use - most noticeable on white backgrounds

So two questions:

1. Did the 470S previously even support a WQHD screen from factory?
2. Could bad batteries (inconsistent voltage) be the source of the panel's flickering when running off battery

Bonus Question: This screen is REALLY bright. It's really pleasant to use. But has anyone had issues with heat when the brightness is at this level?

[gianry]

1. Did the 470S previously even support a WQHD screen from factory?
2. Could bad batteries (inconsistent voltage) be the source of the panel's flickering when running off battery

1) I dont think there is a different graphic card or mainbord
2)No

Is the WQHD panel a new product or refurbished / used one ?

[htc4668]

The cable + panel replacement were OEM, new. They worked perfectly - just only if I have external power plugged in.

[gianry]

it is a strange issue. it is diffucult to understand the way to fix .it is necessary an electric scheme