Panasonic KX-FT982LS-B Service Manual page 112

KX-FT982LS-B / KX-FT984LS-B / KX-FT988LS-B
12.5.6.1. Check the Status of the Digital Board
After the power is turned on, the ASIC initializes and checks each IC.
The ROM, DRAM, and modem are checked.
If initialization fails for the ICs, the system will not boot up.
In this case, please find the cause as follows.
REFERENCE:
NG Example (P.114)
Power Supply Board Section (P.120)
112