Software Update Step - Lenovo L2021 Wide Service Manual

Lenovo Service Manual
Key Board---
OSD no working

9.4 software update step

After replacing the Main board and the Panel, Check if white-balance is within the specs ,then re-writing DDC is
necessary.
Software information:
U401 056G1125191
SMTCR-U401 100GLRSA006B11
U501 056G 562201
CBPCARJG1J1
Step1：Connection
1. Connect USB cable to the PC USB port and the ISP tool,（715GT089-B） ；
2. Will be the Monitor VGA cable to connect ISP tool ；
3. ISP tool card connection as shown below
OSD is unstable or not
working
Is Key Pad Board connecting
normally?
OK
Is Button Switch normally?
OK
Is Key Pad Board normally?
OK
Check Main Board
IC RTD2122L-LF LQFP-48
L2021W_SEC_LTM200KT03_M20_RTD2545LH_100729_v0.01_Eng.H00
IC RTD2545LH-GR QFN-48
G3327-1-X-X-2-090407 FOR L2021WA
Connect Key Pad Board
NG
Replace Button Switch
NG
Replace Key Pad Board
NG
42
Check flow chart
For the key board
L2021W