1. change the VGA cable and test.
2. Plug to another PC or notebook and test.
if still no signal, it might be the display board inside the LCD is faulty.
You need to get a certified technician to fix it.
If cost is higher than 1/3 of a new 18.5" new :LCD monitor; I think you need to think of purchasing
a new LCD already. As new LCD will cover you with 3 years warranty.
take care.
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