What steps should be taken to troubleshoot an ADF4108 evaluation board that stopped responding to SPI communication and exhibits increased current consumption after being exposed to overvoltage?

To troubleshoot an ADF4108 evaluation board that stopped responding to SPI communication and shows increased current consumption after being exposed to overvoltage, first confirm the data being sent to the ADF4108 chip is correct by checking the SPI communication protocol. Measure the current consumption on the power supply and compare it to the initial value when the board was first programmed. A significant increase in current consumption when initializing the chip could indicate damage to the ADF4108. Additionally, check the output of the charge pump, which should show pulses at the PFD frequency (1 MHz in this case). If the CE pin remains high and does not change during data writes, and the MUXOUT LED remains on regardless of settings, the ADF4108 chip is likely damaged and should be replaced.