I changed pickups in my robot, now it doesn't tune. what could the problem be?

The first thing to remember is that the strings will stretch so i always over tune it about a turn for small strings and 3 for the big strings. To prevent it from slipping when you are tightening the string pull it tight while turning it and make sure the string has overlapped its self a couple times before releasing it.

Is the battery installed in correct polarity? If so- try rotate it in position to rub through potential corrosion.

Since it has a remote battery, it would not hurt to look at the installation to make sure no wires are broken. Especially the ground wire to the pickup.

It might also be a good idea to apply some contact cleaner to the output plug since it is in the power circuit. Cycle the plug in and out a few times to clean the contacts. Also some contact cleaner to the preamp controls would be useful.

Be aware some lubricants may contain silicone and that can interfere with wood finishes or repairs to the finish in the future.

if you have the adjustable bridge try moving it back a little bit. the g string is a heavy string and will tend to go sharp when you have the string height up a little. make small adjustments usually only one turn or half a turn at a time. take care to note your adjustments so you can always go back to where you started. turners are nice but the ear doesn't lie. if it sounds right it's right

You didn't tell us what brand or model organ... If the organ is digital, then it likely has a pitch control or paraameter to set it for A440...
If it is analog type organ, then components could be adjusted or replaced to fix the problem.

I wouldrestore factory settings, but ALSO check the condition of your strings... they do wear out.

In a guitar with 3 pickups a 5 way switch works like this. With the switch all the way forward( towards the tuning pegs) the pickup closest to the tuning pegs or end of the neck is completely on ( if your volume control is all the way on). The next position (moving away from the tuning pegs or neck) is a combination of the neck pickup and the middle pickup. The third position moving away from the neck is completely the middle pickup. The fourth position is a combination of the middle pickup and the bridge ( where the strings are fastened) and the fifth position is completely the bridge.

This is one that you'll have to take to a Gibson dealer- not a lot known outside of them, parts aren't readily available. You may need the hardware replaced

The frequency of the A string when in tune is 110Hz.

What you are hearing is actually 120Hz which is the second harmonic of the 60Hz power frequency. It would be hard for you to distinguish between 110 an 120.

Try this test: Bring something that produces a reasonable magnetic field such as a wall wart power adapter that is powered near your pickup... Then you will be able to see that you are picking up stray magnetic fields from your environment.

Humbucker pickups attempt to quash such pickup by winding the pickup so stray magnetic fields cancel in adjacent coils.

Some pickup CAN occur on your cord and also in an amp.

If you leave your cable unplugged from teh guitar you are LIKELY to pick up some of this hum... The second harmonic pickup is COMMON when devces like full wave rectifiers are driven by transformers in the area.

Are you sure you are struming the G string at the right point? One might be able to fool the tuner by triggering a harmonic on the strings or being too aggressive in the strum.

I would pull the peg and see if the string CAN be tuned manually. It is possible the G string is bad or somebody put the wrong string on there.

Remember that strings can be within about 10% of the breaking tension when in tune.

Also it appears that the thing can detune itself to nearby keys. Make sure you have the dial set correct when you pull it out to tune.

idk how i did it. i kinda just clipped the strings a bit more and it worked :)