How does remote and on-site after-sales service work for a used LED screen?
A good service process starts with a case numb…
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What should be included in the used-LED handover and maintenance pack?
The handover pack should make the system maint…
What does a professional used-LED quality inspection service include?
A quality inspection service should combine do…
What should be included in a professional used-LED repair service?
A professional repair service should begin wit…
How do I decide whether the problem is a module, receiving card, HUB or power supply?
Do not choose a part only from the visible sym…
Why does a used LED screen restart or dim after running for a while?
Time-dependent failure often points to power, …
What should I do if the used screen is dim or has a brightness mismatch?
First separate a whole-screen brightness issue…
What should I check when a used screen flickers, ghosts or shows colour defects?
Describe the symptom precisely before changing…
How do I diagnose one faulty cabinet, row or column?
The shape of a local fault is evidence. A comp…
How should I diagnose a black screen or “No Signal” message?
Define the scope first: whole system, one proc…
