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DS90UB941AS-Q1: Screen flickers and lock is low

Part Number: DS90UB941AS-Q1

Hi team,

My customer now use 941 and 948 and found the screen flickers and when flickers, the lock signal is low. 

1. Customer already try to only use 941 pattern, and even in pattern mode, the screen also flickers. (Because customer only do head unit side so they can't enable 948 pattern mode now)

2. The cable is only 30cm

The timing of 941 is :

The timing of 948 is :

The SCH is as following:

SK8808-04_20210805_941原理图.pdf

The register of 941 is:

{FE, 0C}
{01, 08}
{1E, 01}
{03, 9A}
{17, 9E}
{5B, 07}
{56, 80}
{4F, 8C}
{0D, 03}
{0E, 33}
{0F, 03}
{34, 0C}
{35, 00}
{36, 00}
{37, 80}
{38, 7F}
{39, 07}
{3A, 00}
{3B, 00}
{3C, CF}
{3D, 02}
{6A, 88}
{6B, 1E}
{6C, 32}
{1E, 02}
{03, 9A}
{17, 9E}
{5B, 07}
{56, 80}
{4F, 8C}
{0D, 0E}
{0E, 33}
{0F, 05}
{1E, 04}
{32, 80}
{33, 07}
{34, 0C}
{35, 00}
{36, 00}
{37, 80}
{38, 7F}
{39, 07}
{3A, 00}
{3B, 00}
{3C, CF}
{3D, 02}
{6A, 88}
{6B, 1E}
{6C, 32}
{40, 04}
{41, 05}
{42, 3E}
{01, 00}

The register of 948 is:

Could you kindly help to give some advice?