Indicator Lights Strip

The expected start-up sequence for the MPLAB PICkit 4 debugger is:

1.Purple - steady on for approximately 4 seconds.
2.Blue - steady on. The debugger is ready.

The indicator light strip has the following significance.

Table 1. Typical Light Strip Descriptions
Color	Description
Blue	Power is connected; debugger in standby.
Orange	Power target circuit from PICkit 4 checked.
Green	Power target circuit from PICkit 4 unchecked.
Red	Lit when the debugger has failed.

The following tables provide descriptions of the indicator lights and bootloader errors.

Table 2. Additional Light Strip Descriptions
Color	Description
Blue	Power is connected; debugger in standby.
Orange	Power target circuit from PICkit 4 checked (see Table 1).
Green	Power target circuit from PICkit 4 unchecked (see Table 1).
Purple	Bootloader is running.
Yellow	Debugger is busy.
Red	An operation has failed.
Purple	Fast blink indicates the time window for forcing the debugger into Bootload mode.

Table 3. Bootloader Error Descriptions
Bootloader Errors	Description
Red, slow blink	Power accessing the debugger’s serial EEPROM.
Red, fast blink	Bootloader API commands cannot be processed.
White, fast blink	A runtime exception occurred in the tool firmware.