dvd player no disk fault

1)first check the lens ribbon cable,if old or  malfunction replace it.
2)tray motor running speed  may be very slow,replace it
3) finally no resolve replace the dvd lens. 

howto check computer power supply  .
mother board connector green wire and gray coloured wires are short ,then power supply is on .

how to reset the dvd player with all function s are get not functioning . 
you can see the motor control ic (servo )  ic power supply pin and the ground pin short at one second.this time switch on the dvd player and supply to mains supply for the set.
   then switch off the mains and about 10 seconds .
after 10 seconds switch on the mains to set and check the set working,if not you can repeat this several times .ok try this.  

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LG old tv

1)LG tv TV is working but channels are not stored.
2) TV is working but some buttons   are not function
not  the memory ic defective only the resistor packs in the front and rear side of the micro
 controller ic .
you can replace 02 of 472 resistor pack.

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