Synaesthesia

Oh, my apologies! Are they prone to failure? There's quite a lot of protection between it and the board; with it being the first point of contact for spilled drinks and the like could it be any of the resistors in line going to the cable for the mainboard being corroded?

Sorry for going radio silent on this! Yes, I'm back up and running after replacing the line buffer on the keyboard and the 2 6850 controllers/ The latter set me back under £8 for the pair delivered, and 5 line buffers cost £6. They're not full controllers so not sure what people are saying about requiring atari specific stuff unless I misunderstood. Purchased from ebay - SN74LS244N OCTAL BUFFER AND LINE DRIVER - 5 off and MC6850P DIP- 24 Integrated Circuit from ON Semiconductor Overall very pleased. Installed HxC firmware onto the Gotek and carried out the required modifications for a dial and on screen display rather than relying on the built in one and works extremely well. Now pondering whether to invest in a RAM upgrade to bring it up to 4mb or just throw it on ebay as is. Or I'll just end up playing countless rounds of Canon fodder again! :D

Argh rookie mistake, I see what you mean now about the pins So yes, reset is fine and that power is under load. It's one of those crappy Tokin power supplies, I'll recap that tonight. Have ordered replacements for U52 and U54 as they were a pig to get out even with a soldering gun, so rather than risk putting them back in a pair of new ones wasnt even £6. Cheers

Cheers. Yeah floppy appears OK. I note 5v is closer to 4.8 but that seems to be normal for these things. Will try swapping those chips, cheers Did indeed count pin 2 yes. Is there a method of testing the reset circuit? (reset switch works, also pin 7 is noted as reset signal on the keyb connector its actually ground (and is suppoised to be)

Picked up a 1040STF recently and have been tinkering. It came with a bad attempt at floppy drive cable reinstallation and some keys were funny. Tackled the floppy drive first by soldering a header on for data to use a standard cable and got a GOTEK drive sorted for it. However since doing that, the keyboard has stopped functioning completely - as has the mouse. No clicks when you keep keys pressed down etc. Power light is on and there is a very, very feignt flickering of the FDD activity light. Have tried another keyboard and has the same symptoms and have carried out basic diagnostic where I can; the schematic I have is for a different version of the mainboard (mine is C070859-001) so some things differ to others - pin 7 of keyboard connector on others goes to the RESET signal - on mine it goes to ground. Obviously +5v on pin 3 appears OK for the lights to do something. Worrying i've worsened or created a new problem around the floppy connector I've reflowed all that including the nearby chip but also hasn't appeared to help. Just to absolutely rule out 2 duff keyboards Ive changed the buffer chip to no avail. Is there anything else I should be doing to check, any common faults etc? Looking around here, youtube etc the only common issues seem to center around the buffer. Huge thanks (This is all with the motherboard out of the chassis and all drives removed)