Before you do anything, make sure the power supply can handle the transmit current of the rig.? If it did it before, it’s probably fine.
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And definitely, take out the blade fuses from the DC wires to the radio and reinsert in their sockets.? Repeat x 2.? Corrosion is a major problem on those contacts resulting in increased
resistance and voltage drop causing the radio to reboot when transmitting is attempted.
I've owned my 7000 since new. Recently upon attempting to TX on hf the radio re-starts. Any ideas before I send it off? Tried different antennas same result. Haven't tried vhf or uhf.