The cost of maintenance depends on the damaged components. If it's a chip, it's usually around 150. In the case of switches, large filter capacitors or power regulators, it is approximately $80, but it may vary by region。
In general, the lcd black screen problem is due to problems with some components of the lcd power circuits and drive boards, such as damage to large filter capacitors, internal short circuits in power switch tubes, burning of fuses, damage to single chip chips, damage to image processing chips, opening of power pressors, etc., leading to a black screen phenomenon of the lcd。
Extension:
1. If the repair master comes to repair the television, they should first ask the owner about the damage and the status of the television, prepare the models and drawings of the television set, understand the various parts of their operation, and make it easier and more professional for us to repair them and not simply connect elements such as variable electrical resistance in the television until the cause of the failure has been clarified。
2. In the course of maintenance, in the event that the tube is broken, it cannot be replaced with copper wire or other large packagings or, in particular, by replacing the test machines directly after the tube has been burned, with the result that other components may be burned directly, and if replacement is needed, it will also require safeguards consistent with the original component parameters。
There are certain safety risks to electrical appliances, so we have to be safe before we can repair the television. The professional approach is to wear insulated rubber shoes, distance from water pipes, etc., in order to reduce the damage to the human body caused by accidental electrocution, and in the course of repairing, if we need to replace some parts, etc., we must first cut the electricity of the television。
4. High voltage cannot be checked in maintenance without the use of discharge methods. Otherwise, excessive discharges will burn down some of the components in the television, with the consequence that the problem of the television is simply magnified and more difficult to repair。
