This error message (or a variation like "Device not found" or "ISP not connected") when using an iProg programmer usually indicates a communication failure between the software, the programming clip, and the chip you are trying to read.
Avoid USB Hubs: Always plug the device directly into the motherboard’s USB port (the back ports on a desktop). iprog programmer not connected hot
pnputil /enum-drivers to find iProg driver.Short circuit in internal transistors or faulty power converter. Disconnect immediately to prevent further damage. Power Loaded Error Internal power module issue or damaged transistor. Hardware repair or replacement is typically required. Voltage Jumps This error message (or a variation like "Device
Causes: