Sharp lcd-46lx265a LCD TV flash screen black screen sound backlight problem
Author:Ye Yu Time:2021-09-09 08:44 Browse(230)
There are several reasons for this phenomenon
There are several reasons for this phenomenon. If it is a flat-panel TV, the first is the poor contact of the internal power board components, the second is the poor performance of the power board components, the third is the problem of the CPU on / off control circuit, and the fourth is the fault of the protection circuit;. If it's a picture tube TV, in addition to the above reasons, we should also consider whether the pin welding points of the components in the output circuit have poor contact, and whether the components have poor performance.. Because of the above reasons, the power supply circuit or row output circuit may be suddenly cut off during the normal watching process of the TV, resulting in the power supply circuit or row output circuit suddenly stop working, thus causing the fault phenomenon.. This kind of fault is more complex, first of all, we should carefully check whether there is bad contact at the welding point of components in each circuit, if we can determine that there is no bad contact, then check and replace the power supply and line output circuit related circuit components.. Note: if you are not familiar with the knowledge and working principle of the TV internal circuit, do not repair it by yourself, so as to avoid the risk of electric shock or the expansion of the fault.. Maybe the logic board of the TV is broken. It's suggested to contact the after-sales department to dismantle the machine and check it... Let's see what other people say..
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