1. Check the fuses: The instrument cluster is powered by fuses, so the first thing you should do is check the fuse box to see if any of the fuses related to the instrument cluster have blown. If any fuses have blown, replace them with new fuses of the same amperage.
2. Check the wiring: The wiring that connects the instrument cluster to the rest of the vehicle could be damaged or loose. Inspect the wiring for any damage or loose connections, and repair or reconnect any that are found.
3. Check the instrument cluster ground: The instrument cluster needs a good ground connection to function properly. Check the ground connection for the instrument cluster to make sure it is clean and tight.
4. Check the instrument cluster dimmer switch: The dimmer switch controls the brightness of the instrument cluster lights. If the dimmer switch is not working properly, it could cause the instrument cluster to not come on. Check the dimmer switch to make sure it is functioning properly.
5. Replace the instrument cluster: If all of the above steps have been completed and the instrument cluster still does not come on, it is possible that the instrument cluster itself is faulty. In this case, you may need to replace the instrument cluster with a new or refurbished one.
It is important to note that working with electrical components can be dangerous, so if you are not comfortable performing any of these steps, it is best to take your vehicle to a qualified mechanic for diagnosis and repair.