LC-60LE857E (serv.man3). March 2013 - Sharp TV Service Manual (repair manual). Page 59

LC-60LE855E/K,60/70LE857E/RU,858E,70LE857K

6 – 13

Is the AC cord connector tightly connected to the set?

NO

Reconnect the AC cord tightly and turn on the power again.

YES

Are the wire harnesses and other cables properly connected to 
the set?

NO

Reconnect the wire harnesses and other cables properly to the set.

YES

Is power supplied from  pins [15/BU+5V] of [PD]P3801 ?

NO

Replace the power unit.

YES

Is there the pins [14/PS_ON] of [PD]P3801 at “H”?

NO

Check the signal line between PS_ON and IC2004(UCOM)/
IC3301(Digital AV decode & Main CPU) .

YES

Is there the pins [13/AC_DET] of [PD]P3801 at "H"?

NO

Check the power unit ,
and the signal line between AC_DET and IC2004/IC3301.

YES

Is power supplied from pins [5~8/UR+13V] of [PD]P3801 as 
specified?

NO

Check the line between PS_ON and IC2004/IC3301 .

YES

Are the DC/DC converter outputs and the output voltages along

NO

Check the DC/DC converters and the control lines. 
Replace defective parts as required.

1) BU3.3V            (IC9605 etc.)
2) D5V                (IC9607 etc.)
3) U5V                 (IC9607 etc.)
4) D3.3V               (IC9606 etc.)
5) M2.3V               (IC9601 etc.)
6) D1.5V                (IC9604 etc.)
7) D1.2V                (IC9603 etc.) 
8) AT5V               (IC1104 etc.)
9) TE+1.2V              (IC1102 etc.)
10)  IF+1.8V               (IC1109 etc.)
11) SAT+1.2V         (IC1102 etc.)
12) STB+3.3V         (Q9602 etc.)
13) AVDD12_HDMISW    (IC2602)
14) CPU_ADAC+3.3V      (IC3303 etc.)
       (IC3302 etc...)
       (IC3105 etc...)
       (IC1903 etc...)