ZX Spectrum 16K keyboard issue - not all keys works
Posted: Sat Mar 23, 2024 7:12 am
Hello everyone,
Thanks to the advice on this forum, I was able to repair a ZX Spectrum Issue 4s, for which I thank you.
However, I still have one problem that I'm not sure how to approach.
When the upper case (keyboard) is mounted in place, certain keys do not work (5 and T never work, and 6 and Y work intermittently).
When the upper case is not mounted in place (I hold it suspended), but connected, all the keys work.
From what I understand, the culprit could be the membrane or something related to the hardware.
I hesitated to order a new membrane before asking for your advice, as the total costs to my shipping at location are quite high.
Before I order the membrane, I would like to ask for your advice on whether there are any checks I can do to make sure the hardware is OK.
Thank you in advance,
Alex
Thanks to the advice on this forum, I was able to repair a ZX Spectrum Issue 4s, for which I thank you.
However, I still have one problem that I'm not sure how to approach.
When the upper case (keyboard) is mounted in place, certain keys do not work (5 and T never work, and 6 and Y work intermittently).
When the upper case is not mounted in place (I hold it suspended), but connected, all the keys work.
From what I understand, the culprit could be the membrane or something related to the hardware.
I hesitated to order a new membrane before asking for your advice, as the total costs to my shipping at location are quite high.
Before I order the membrane, I would like to ask for your advice on whether there are any checks I can do to make sure the hardware is OK.
Thank you in advance,
Alex