For experts to discuss very technical stuff and newbies to ask why the Spectrum they bought off ebay doesn't work.
- Manic Miner
- Posts: 236
- Joined: Wed Nov 15, 2017 2:52 pm
- Location: Sunny Somerset in the U.K. in Europe
Do you have, or have access to a logic probe or an oscilloscope, or maybe a logic analyser?
If yes, then it should be possible to determine if the system is trying to write data to the AY chip.
If you have a multimeter, you can test the power supply pins of the AY chip.
- Posts: 7
- Joined: Mon May 07, 2018 3:04 pm
- Location: Staffordshire, UK
Yeah, I do have a multimeter.
I was going to have a look over the board at the weekend and get the multimeter on it to see if I could spot anything, but the battery has gone in the multimeter.
*sigh* nothing is ever simple!