PB Kanga speaker diagnostics?

[MattB]

I have a Kanga that is in good working order, but I think the two speakers above the keyboard are not functioning. Is there any way to run diagnostics on the individual speakers or to disable the screen mounted speakers to test the keyboard mounted ones?

 

[galgot]

I've started a 3400c with the screen lid disassembled once, can't remember if I had a chime though, some time ago and was testing a very troublesome machine.

But anyway , it's easy to disconnect the screen ribbon cable under that speaker panel, then reconnect the speaker panel, and test.