Lg g4 sudden dead

My G4 was suddenly dead at last couple hours , just received a call after that the device won't turn on whatever i've done . Swapped with backup battery doesn't work either . I think the motherboard is defected , does someone know how much it cost for the motherboard ?

P/S : I owned the device with start S/N 505K .. & NO MORE LG PHONE !!!!!!!!!!!

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Sudden Huge "Miscellaneous" Battery Drain

Hey everyone,

I haven't posted here in a while but I've got a problem that suddenly surfaced on my Nexus 4.

I am running Android 5.0.1 and my ROM is Mako (beta.v0.8-20141206-OFFICIAL-mako).

Starting yesterday afternoon, my battery is suddenly draining extremely fast. Even with the screen off it drains about 30% every hour, which is ridiculous because just the day before it was only about 1-2% every hour... It also takes a very long time to charge. I charged it all night last night (about 7 hours) and it only gained 45% battery.

According to my power usage it says that "miscellaneous" is taking up 52% of the battery so that must be the cause, but that's not really helpful because it doesn't explain what miscellaneous task is the specific problem...
I haven't installed anything new, or updated any apps, or uninstalled anything. I haven't really changed anything at all for a while now.

Does anyone know how to solve this? Thanks a lot in advance! ;)

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