How can I quickly clear the memory on the calculator completely?
The easiest way is to do a ‘re-boot’ or hard reset. This is done by holding down the ON button and, while still holding it down, pressing & holding the first and last of the screen buttons. Wait about a second and then release the buttons in the opposite order. On the HP38G it doesn’t matter if you don’t get the order of release right but on later models (39G/40G/39g+/39gs/40gs) it does matter. You have to release SK6 first, then SK1, then ON. If you’ve done it right you should see a message telling you that the memory has been cleared. If you get the order wrong then it may go into diagnostic mode with all sorts of garbage appearing on the screen. Press ON+SK3 to stop this. Note: The ON+SK3 is a less drastic version called a soft reset which only does a ‘memory sweep’ rather than a complete memory clear.
