for the audio (speaker) look at the Green and the yellow lines, connected the both pad speaker lines to the two resistors behind the audio Ic's.
If now your phone turn off after 5 minutes, i think it's PA or DIALOG problem, change the PA first (similiar with N.33xx), then if still change the DIALOG.
post the result ok!!
keep enjoy and smile with your job, and safe your money !!!!
Regards
UNGGUL