MPLAB® PICkit™ 4 Debugger Indicator Light Strip

The expected start-up sequence for the MPLAB® PICkit™ 4 debugger is:
Purple - steady on for approximately 4 seconds
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 and debugger is on standby.
Orange Power target circuit from the PICkit 4 debugger checked.
Green Power target circuit from the PICkit 4 debugger unchecked.
Red Lit when the debugger has failed.

Table 2: Additional Light Strip Descriptions

Normal Modes Description
Blue Power is connected; debugger in standby.
Orange Power target circuit from the PICkit 4 debugger checked (see the "Power Options" page).
Green Power target circuit from the PICkit 4 debugger unchecked (see the "Power Options" page).
Purple Bootloader is running.
Purple Fast blink indicates the time window for forcing the debugger into Bootloader mode.
Yellow Debugger is busy.
Red An operation has failed.

Table 3: Bootloader Error Descriptions

Bootloader Errors Description
Red Slow blink indicates problem accessing the debugger’s serial EEPROM.
Red Fast blink indicates that Bootloader API commands cannot be processed.
White Fast blink indicates that a runtime exception occurred in the tool firmware.

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