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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Repair the singer DVD player

1:power supply pcb fault.
a: check the op-to coupler you can see it's pins are corroded
b: replace the coupler
c: replace all corroded resistors
d: re soldering the  pcb.
   

how to repair easily national Tc 2001 TV protection on fault

1: it has protection board near the vertical ic.
2: remove the three transistors and replace.
3: two tr are npn one is pnp easy locate there.
.4:some TV hasn't no external protection board ,three transistors in motherboard near the vertical ic
5:you can follow the step 2 and step 3 good luck.
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How to repair dvd player ,No disk fault

1).check the lazer pick up is clear from dust.If yes clean the lens carefully.If no goto (2).
2)Check the pick up ribbon  cable if bad ,replace it.
3)If doesn't work replace tray motor.then OK.