lenovo G505 Power on and battery indicator lights are very dim.

i am using lenovo G505. Two days back when i was browsing the screen went black for a fraction of second. Same night when i switched it on it was getting tripped and there was no indication of power on and power supply. i connected the adapter to the laptop, and waited for about 15 minutes. after that it again tripped twice, but i restarted. then i checked the health of all components like harddisk, cd drive, ram etc. Every thing was ok. Next morning it was not getting started. I opened the laptop removed and placed ram again. then i put the laptop for charging. but there was no indication of power supply (charger connected). After some time i saw very dim light for charging then i started the laptop. laptop got started and is working fine after that but the indicators of power on and power supply are very dim. the only thing is that i have to connect charger and wait for sometime before using and the indication lights are very very dim.Also (sometimes) it shows charging icon but says battery not charging at 60 %. What should i Do now. Should i use it like that or it is very risky. Please help. i think i am the only one who have such problem.
thanks...