Tilt The chair is supposed to tilt back when sitting in it but I cannot figure out how to make it do that.

the up/down is a gas strut and is replaceable
cost is from $45.00 to $100.00 aud and comes in 2 lengths
the fitting is a taper at each end and it requires a solid hit to remove the base and seat from the gas strut
gas struts are available from good office furniture shop /retailers

This should be visually diagnosed to get an accurate identification of the issue. That said, I would look to the tilt motor having broken teeth on the sprocket or a broken drive gear. Also the drive chain may be loose enough to allow it to slip on the sprocket. In most cases, the issue is with the tilt motor mechanism. Removing it will determine if an adjustment is all that you need or if it needs replacement.

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Although the Graco high chair comes with a tray that you can tilt position wise, it shouldn't be tilting forwards.
Use the instruction manual and make sure that you have clipped it in properly.
If it's still tilting forwards then take it back to the place where you bought it to have it checked before you put a child in it, just in case it's faulty.
Good Luck

I am making some assumptions based on your description of the problem:
1: You have a Jazzy 1113 with tilt.
2. You have batteries that are fully charged as indicated by the battery display
3. Your chair is not in freewheel, that is the brakes are engaged with the levers in the correct position.
4. The motors are not turning.
5.You do not state the type of tilt system but I am assuming it is either true balance tilt by Pride or Motion Concepts tilt.
6.You have no flash error code on the battery display.
7. You do have a flash error on the joystick.

My initial response based on these assumptions is that your chair is in drive lock out and the electronics are inhibited because of the following reasons:
You have a bad switch that indicates to the electronics that the chair is in tilt or more than 20 degrees of tilt. You have a bad inhibit harness. You have a bad end of travel switch on the actuator. The list is long depending on the system.
Check all the wiring and switches associated with the tilt system for broken/disconnected wiring.
Get back to me with exact specs of the system including type of tilt system and the serial number of the chair so I can research the configuration and give you exact and not general answers. I hope we are off to a good start.

THE WHEELCHAIR WILL ONLY TILT IT WILL NOT GO FORWARD OR BACKWARD USING THE JOYSTICK

The TRO is a new tilt-system offered by Golden so I am not familiar with any glitches it may have, but I would first check to make sure that the connections from the toggle leading back to the tilt-box in back are all well-connected. Unplug, and replug all connections as far back as the power supply for the tilt system, which goes back into the base of the chair to the controller. It's important to completely unplug and replug and not check them visually, as a loose connection cannot always be confirmed by sight alone. Also, check the fuse to the tilt feature. I am not sure if this one has a separate circuit breaker for the tilt option, but if it does, check that as well. The toggle protrudes out from the front and is subject to impact damage. A lot of folks try to get 26 inch wide chairs through 25 inch wide doorways, as I am sure you've found out. If you've rammed the toggle into a door frame, table or other fixed object, it may be the switch. Checking its operation with a voltohmeter is the likely approach to insure that the toggle is not damaged and is doing its on/off duties. The fact that you aren't getting a power available light seems to make the toggle not the culprit, but it's worth a shot.

Hope this helps. Good luck.