STEAM
PC
Check that the clamps are making secure, metal-to-metal contact with the terminals. If the contact is clean and tight but the screen remains blank, the battery voltage may be below the minimum threshold required to power the device (typically under 7 Volts).
: Never perform a wet test on a diesel engine, as it can cause serious engine damage due to higher compression ratios.
One reason the is still in demand is the resurgence of small engine repair (lawnmowers, tractors, generators) and classic car restoration.
