The tv will not power up, nothing happens when i press the power button
The power supply section inside your TV is not working. It may be due to a blown fuse, or its inverter secion itself. You have to open your TV to detect and repair the fault. If you are aware in electronics, open it, and check the fuse first. If it is found blown up, replace a new one with same rating. Do not use an other rated fuse, as it may damage more components, if there is a fault inside the circuit section of the power inverter board. If the newly inserted fuse also blow out, as you switch ON the TV, never put any fuse there, and it must be due to some fault to that section, should be checked well. Without any reason, a fuse won't blow up you see. We must find out the reason for that and rectfy it before replacing an other fuse in place. Normally, rectifer diodes, inverter device, a transistor or an STR, whatever may be the case, should check with its schematic diagram, and replace them. Whe power reguator [inverter] side get a fault, it will cause more component in that section to be out of order. So you have to check each component on that section before replacing and switch ON the TV.
If you have a sound knoledge and measuring instruments with you, you can do it by yoursef at home. If not, get it repaired with an experienced service technician. OK.