Does the computer not turn on the power supply only?
There is radiation in the current flow in the wire, but the radiation is relatively small. So do not boot will have radiation, but the radiation is relatively small.
Desktop, then the general compatible machine is relatively large, brand machine is relatively small. Concrete is not good to say, there are always special circumstances, but not sure to start a lot better than boot Under normal circumstances, there is no relationship between the boot, did not boot, then there is no operation, no heat, no radiation source.
The computer is not working when the boot is only a relatively low working condition, so do not boot power is also a radiation. If you do not want the computer to have radiation, then the computer shut down the power cut off, so the computer is basically no radiation. Radiation is not necessarily the time of live work. There are a lot of electronic components inside the computer, all kinds of metal materials are, at any time there is radiation, but usually small is very small, can be ignored. Really want to isolate the radiation, then wear a radiation suit it.