Look for the transistors labeled (NPN) and BC807 (PNP).
If the unit gets hot with only the USB cable attached, a component has failed. Common Culprits on the iProg Board:
Check the resistor marked or the pull-up resistor connected to the USB data lines.
Cheap clone casings can melt under prolonged heat exposure. Why is Your iProg Hot and Not Connecting?
Run the test to check the health of the internal relays and voltage outputs.
If your device is properly connected, you can utilize its full suite of automotive electronic functions:
Stray solder balls or bridged pins from the factory can cause a direct short circuit.
Many clone boards are shipped with incorrect resistor values or bad solder joints around the power management section. This allows unregulated voltage to flood the main processor, causing the chip to get hot and stop communicating with the software. Step-by-Step Diagnostic Process
A tiny, microscopic solder blob bridging two adjacent pins (e.g., VCCcap V cap C cap C GNDcap G cap N cap D , or data lines to power lines).
