Reset a Frozen Infotainment Screen

Last updated: June 12, 2026

When the centre screen in your SsangYong Musso (Q200, 2018–2023) pickup freezes — navigation stalls, the touch surface stops responding, or the unit hangs on the boot logo — a forced restart fixes it in well under a minute. The Q200 runs the SsangYong MTXW100Y40 multimedia head unit (the same unit fitted to the Rexton SUV), an 8″ or 9.2″ touchscreen with TomTom navigation. It is an embedded computer, and the standard recovery for a lock-up is a knob-hold reboot, not a dealer trip.

What the Musso runs

Lower-trim Mussos (EX) use the 8″ screen; Rhino and higher trims get the 9.2″ unit with built-in TomTom maps. Both are touchscreens and both keep one mechanical control — the Power/Volume rotary knob in the corner of the bezel. That knob is your reset control: holding it cuts power to the processor and forces a clean restart of the MTXW100Y40 head unit.

Soft reset — hold the Power/Volume knob

1. Park the Musso, apply the handbrake and leave the ignition in ACC or ON so the screen stays powered. The engine need not be running.
2. Find the round Power/Volume knob on the corner of the touchscreen panel.
3. Press and hold it — keep pressing past the point where the audio mutes, about 10 seconds.
4. The display blanks and the SsangYong logo reappears. Release the knob.
5. Allow 20–40 seconds for audio, Bluetooth and the TomTom map engine to reload. The reboot is finished.

Will a reboot erase anything?

No. The knob-hold restart clears only the unit’s temporary working memory. Paired phones, radio presets, saved navigation destinations, TomTom map data, brightness and language all live in permanent storage and are untouched. It is like restarting a phone, not resetting it — safe to repeat whenever the screen acts up.

If it stays frozen

• Full ignition cycle. Turn the truck off, open the driver’s door, wait two minutes for the head unit to power down with the CAN bus, then restart. A quick off/on may not drop power.
• Pull the AV/audio fuse. With the ignition off, open the cabin fuse box (lower dash / passenger footwell) and remove the head-unit / AUDIO fuse for 30 seconds, then refit — a guaranteed hard power-down when the knob is unresponsive.
• Check the map SD card. On TomTom trucks a loose or corrupt navigation SD card can hang the unit on boot or freeze the route. Re-seat it; a damaged card needs re-imaging by a dealer.
• Disconnect the battery. As a last resort, disconnect the negative terminal for two to three minutes to reboot every module, then reset the clock.

Factory reset (erases data)

Use this only if the unit keeps misbehaving after reboots, or before selling the truck. With the system on, open Settings → General/System and choose Factory data reset (or Default). Confirm to wipe paired devices, presets, saved destinations and accounts back to factory state. Always try the knob-hold soft reset first — it clears almost every freeze without deleting a thing.

Frequently Asked Questions

Which knob reboots the Musso Q200 screen? The single round Power/Volume knob on the corner of the touchscreen. Press and hold it about 10 seconds until the SsangYong logo returns.

Will I lose my TomTom destinations or maps? No. A knob-hold reboot leaves saved destinations and on-board map data intact — only working memory is cleared.

Is the Musso head unit the same as the Rexton’s? Yes. Both use the MTXW100Y40 multimedia system, so the reset steps are identical across the pickup and the SUV.

The screen freezes only in navigation — what causes that? Usually the map SD card. Re-seat it; a corrupt card can stall the boot or hang the route, and a dealer can re-image it.

Do I need the engine running to reboot? No. The ignition only needs to be in ACC or ON so the head unit has power; the engine can stay off.

Got a warning light or fault code on your Musso as well? Our sister site autodtcs.com decodes every OBD-II diagnostic trouble code and tells you how serious it is.