My LG p970 can't turn on

My LG p970 can't turn on

Dear everyone

My nephew just gor p970 yesterday

for the name of curiosity, i checked and tried the phone.

the rom is 10a

i did root using gingerbreak

it was succeed. i dont kno why i has to root anyway.

actually no need for installing the special app.

then i registered the phone to access to the market.

installing some media music player with lyrics lrc.

the phone then warns the battery just 15%.

i plugged it to the power AC, and continues selecting the music apps.

after several minutes somehow it hangs, the music is jammed.

i pulled the power cord.

i tried turn off by hold the power button not helped. then i removed the battery.and put in back.

restarted, the 4 low phone button was blinking, the screen was grey.

for several minutes, there's no sign froyo menu.

hopeless, i removed the battery.and put in back agin..

i tried to turn on the phone, and it just like no sign of life. no lg logo.

just quiet like corpse. oh dear, what i have just done?

i dont think it is bootloop case, and i dont think it is software issue, right?

charged for 2 hours without any sign of charging, no led indicating what so ever.

still like a dead mobile phone without battery.