LED INDICATORS ARE NOT WORKING..Inspiron 15R SE 7520 model

While my laptop was working on  battery, I connected my charger adaper to the laptop for recharging the battery. Suddenly, the copmuter got off and did not start again. After the consultation with a technician it is found that the charger got damaged and it damged the motherboard too. Charger was genuine one (Which I got with laptop itself). Then I repaired the motherboard, and then got another problem with display.. While opening the laptop , at some positions, display starts to show some color distractions... That problem also rectified.. Now, the LED indicator of the LAP is not seen working..... Another problem, developing is with the led bezel... It starts to break down into pieces, even on a gentle touch.. I am totally disappointed with this...

Please help..