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H120 bad charger + RTC mod (solved)

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Wacholek:
Last month i fried my H120 player. I connected a nokia 4,5V charger. My original was lost. After a one day of charging player don't wont to turn on. Now its turning on when I press reset button. It's working fine but the main processor is very hot. When I plug in 5V charger you can't stay with the finger on it. Current drain from the battery is around 700mA when its on and hdd in working and about 320mA when the player is off. 
If any one knows what happened or maybe also how to fix this i will be very appreciated.
When I disconnect the connectors board even when the player is on there is no problem with overheating. I've got every tools needed to repair except BGA masks but I don't know the hardware.
Please help!!!

P.S.
How to flash with the new firmware without running oryginal firmware. I run the player on RockBox but on original it hangs.

Wacholek:
I've done some search and I find think that is responsible for non-stop current  consumption of my player plus non response for pressing play button when its off.



The 6-leg thing is a problem. I marked the legs but probably is a wrong marking.
1 - Ctrl - Control leg. When we push the play button when the player is off, on this leg we have 3.3V signal and it sustain until player goes off.
2 - GND
3 - Out- When the signal on leg 1 is 3.3 we have 3.3 on this leg. It is a main power supply for the Motorola. It sould be stable 3.3V. If its 3.6+ Motorola starting to crazy or not fire at all. Only bootloader. If it's less then 3V HDD will interrupt while attempt to buffer a song and the back light of the screen starts blinking.
4 - In - source leg. From the battery +.
5 - ??? - when player is on it has 1.6V normal 0. Don't know if it changes with the battery voltage drops.
6 - GND

So I thing that this little thing is a remote controlled stabilizer for 3.3v out. It can be also a pair of transistor. On is a main switch to turn on the power and the second one is for a 3.3v stabilization of the output.

If any of You know what this thing is pleas let me know. Marking on the think are: LTXQ on the up and 3G31 on the down side.

Chronon:
According to this thread at misticriver, it is a Linear Technology LTC3405.

Wacholek:
Think You very very much. I already ordered several of those DC-DC converters.

Chronon:
Great!  Let us know how you get on with your repair.   :)

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