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27． Front USB not working ---------------------------------------------------------------- 10
28． The front power on key has no function --------------------------------------------- 11
29． Large screen boot without image ----------------------------------------------------- 11
30． When writing, there are shaking (jumping) pen and broken pen (some can write)
----------------------------------------------------------------------------------------------------- 12
31． A lock appears on the screen ---------------------------------------------------------- 13
32． The wireless projector cannot cast the screen --------------------------------------- 14
33． Network connection failed ------------------------------------------------------------- 15
34． No local sound can be heard in the video conference ------------------------------ 16
35． The screen projector has no sound on the screen (computer) --------------------- 17
36． Android and apple mobile phone projection ---------------------------------------- 18
37． Caton occurs when using app under Android --------------------------------------- 18
38． The screen projector is disconnected from time to time --------------------------- 18
39． There are lines on the large screen when it is not powered on, but there are no
lines when it is powered on -------------------------------------------------------------------- 19
40． Startup error: com mstar. IWB. Service stopped running ------------------------- 19
41． No touch in Android -------------------------------------------------------------------- 20
42． The Android camera is not recognized and cannot be connected ---------------- 20
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