If I plug in powered monitors to the digital input... will it get rid of my error code 02 displayed on the screen ?

RESET / Hold these buttons or keys and power on Insert System disk. Hold POPS and power on. Display shows FIND SYSTEM and starts the loading process. Which version do I have? / Hold these buttons or keys and power on Input the following number code: 00009584 or look at Start Screen Which version is the latest? 2.46 How can I get the factory sounds back? RESET

The procedure for performing a Factory Reset is as follows:
1. Disconnect the power supply from the RP100 (AC Power) or unplug the guitar from the input
jack (battery power).
2. Press and hold the Select button while re-connecting the power or plugging your guitar into
the RP100's input.
3.When the display shows --, release the button and press then press the Store button. The
display will then read rEand the RP100 will reset to the original factory settings

Have you tried it with batteries? Are you sure the power supply is working correctly? It should not need the OS to operate as a keyboard disconnected from the computer.

The cable connection is just a MIDI cable that uses opto-isolators so the 2 items are electrically isolated from each other. The software driver for the Korg should load without problem. The Korg program itself may be looking for inputs that are not there when the keyboard is off and the program itself reaches a stop command.

If the PA80 will not work on just the power supply- the power supply can be the fault- it has an internal fuse. Finding a similar supply with the same coaxial plug wired the same polarity is the way to test it if the battery option is not available.

Effects plug into mixer, mixer plugs into power amp. Others may want the mixer and the effects plugged into the power amp for the most available inputs. (when multiple inputs are available.)

Effects and mixer are a line level output and the mixer can be considered a line level input as well. A mic mixer has gain amplifiers for the inputs that are below line level such as unamplied microphones. It is possible to parse to absurdity, but the gist of it is above assuming you do not want to apply the same effects to everything all at once.

Make sure ALL of the interconnected equipment is powered from the SAME receptacle to avoid ground loops due to the safety ground. DO NOT Use two wire power or use ground lifting plug adapters. Make sure you use balanced lines, either XLR or TRS cables. Do NOT use TS cables.

Hopefully you were powering ALL interconnected equipment from the SAME receptacle. People can destroy the input circuit of powered speakers by plugging them into a receptacle at the stage and then powering the mixer from another receptacle... Pro's know to power ALL interconnected equipment from the same source, be it a receptacle or a power conditioner to avoid ground bounce damage to equipment. They carry power from the stage back to the mixer on an extension cord. You may have had a static discharge that blew one side of the balanced input of the speaker. The parts are inexpensive, however the labor to get at the amp is usually not fun. I have the dual 10 powered Kustom's and one gets at the POWER amp via removing the speaker after the grille... HOWEVER that is to get at the power amp. The Preamp is probably the failure and it is right at the input plug area and you can get at that by removing the panel with the plugs and power switch and volume control.
I don't have the schematic. Look for shorted RF bypass caps on one side of the balanced input circuit and possibly a damaged input op amp.

Same thing has just happened to mine !

First thing I noticed this morning was the LED display was stuck on FULL... I unplugged it...and restarted...still the same...repeated that..and now NO LEDS at all ! WTF

Buy a powered stage monitor and gonnect to the MON jack. You will select the channels to go to the monitor with the AUX knobs and the overall level with the MON slider.

Use BALANCED lines to the powered monitor... This is a TRS plug at the mixer end for sure...

REMEMBER to power ALL interconnected equipment from the same receptaacle or source, even if it means running an extension from where your speakers are plugged in to the mixer !!! The ground bounce between power receptacles within a building can destroy your equipment's sensitive input circuits.

You haven't mentioned what model and manufacturer the mixer is. I will have to guess and say that the monitor out on the board isn't providing signal to the powered monitor or the monitor out on your board is powered and is now damaged by plugging a powered monitor into it. Carefully reread your manual and determine if the monitor out on your mixer is powered or line level. Reread also and make sure that the signal you are monitoring is assigned to monitor out, levelled correctly etc. If you find that the monitor out is passive (line level) try hooking it up to an external power amp and speaker. A guitar amp will do for testing purposes. Start with a low input volume on the amp. Also make sure that if it is passive to use a shielded cable from monitor out to input. If your board has powered monitor outs you can use a speaker cable from monitor out to speaker input (non powered monitor speaker).