Reset button on android headunit is missing
I can’t press the reset button
RST button does nothing
What is the RST hole for on an android head unit?
Reset button or often is it shortened to RST and occasionally RES is mentioned in every android headunit manual. You may see it every day or assumed your android head unit doesn’t have one. But it does, just not where you expect it to be.
RST Button location
On many of the popular 10″ and 11″ single DIN androids the RST button is on the front panel. Well, there is a hole labelled RST for reset but it just a hole. The actual RST button sits directly behind this hole. The small aperture hole and set back button needs a tool to operate it. This protects the reset button from all but a very deliberate act to press it.
Reset button tool
There may be a professional tool available for reliably and repeatably pressing the RST button. But for the every day user a tooth pick, straightened paper clip, or one of those SIM card ejectors work well. You may have your favourite reset button tool if you have been forced to become too familiar with the RST.
RST button uses
There is no prize for knowing that the button labelled RST or RESET will perform a reset of the android headunit operation. This reset halts the android running and sends a signal to the MCU to initialise. The process is similar to switching it off and on again. RST can cure bad apps that have gone slow or leaked the memory but restarting the software.
RST has more up its sleeve in some cases particularly for those android headunits without any physical buttons. The Reset button can be used as a communication conduit to the android headunit MCU to control features such as ‘Reboot in Recovery Mode‘ and ‘Navigate the menu and make a selection‘. The RST series of long press, short press and release send a signal to the android headunit to issue commands. The commands are interpreted and actioned without the need for a physical button.