Sinclair QL User Manual page 10

Plug the power supply into a mains socket and switch on. Remove any cartridges from the
Microdrive slots and push the small power supply connector into the three pin plug marked
POWER on the back of the QL.
The yellow power light below the F5 key should now be glowing and your set up should
look like this:
When the computer has been on for a while, the case above the Microdrives will feel
warm, this is quite normal. The QL has no on/off switch but can be turned off by
unplugging the power supply connector. Remember that any program or data in the
machine will be lost when it is turned off and should first be saved on a Microdrive
cartridge (for details of how to do this see the Beginner's Guide and Concepts sections). If
the QL is not going to be used for a while you should also switch the power supply off at
the mains.
TUNING IN
The display signal to the television set is near channel 36. If your set has continuous
tuning, tune to channel 36. If your television has push buttons, choose an unused button
and tune this to the computer' s signal. You may need to consult your dealer or the TV
instruction manual to find out how to do this.
Once you are correctly tuned in you should see the copyright screen.