What do I do if NOCO GB40 won't turn on?

If the NOCO GB40 won't turn on, first check if it's charged. A common issue is that the battery might be depleted. Connect it to a power outlet using the included charger to see if it begins charging. Additionally, inspect the cables and connections; it may also be a connectivity issue. If it's still unresponsive after attempting to recharge, it could indicate a malfunction, requiring customer support or service. Many users have resolved similar issues by ensuring the unit was adequately charged after periods of non-use. Pro tip: Always store your jump starter in a protective case to prevent damage. However, if you find yourself repeatedly having issues, consider whether the device may not be the right fit for your usage needs.