Finally manged to acquire a Lisa 2

[Berenod]

It’s a composite video signal but it’s not standard NTSC it runs at a higher frequency (22 kHz ??). Anyway you’re not most likely to have anything laying around that would work with it.
Have you tried tweaking the parts on the back of the power supply for the brightness and the focus? Also at the bottom of the analog board is a voltage regulator (7824 I think) I’ve had issues with those that usually burns out a resistor up at the top of the board.

Found out it indeed is 22,9 kHz, so not sure anything I have that would work.

And I live in the PAL country

 

[Berenod]

Gonna take it slowly and try to remove the video card.

Not that easy of an undertaking, need to take the CRT tube out to do it sort of safely.

And the 4 screws (more like bolts) turn out to not come out off millimeter country, 6mm too small, 7mm too big, so need to find me a toolset in inches first...

 

[Berenod]

This is ridiculous!

IBM's repair manuals at least extended the basic courtesy of giving you instructions for how to save your co-worker's life:



"Continue without interruption until victim is breathing without help or is certainly dead." --- not a phrase you expect to find in documentation for a small computer. (From the IBM 5100 Maintenance Information Manual.)

From the era that sex was safe and computing dangerous

 

[ScutBoy]

• high, high, high which is no data received from the widget (no surprise there!)

I've heard that about a million times!

 

[Paralel]

This is ridiculous!

IBM's repair manuals at least extended the basic courtesy of giving you instructions for how to save your co-worker's life:

View attachment 53761

"Continue without interruption until victim is breathing without help or is certainly dead." --- not a phrase you expect to find in documentation for a small computer. (From the IBM 5100 Maintenance Information Manual.)

Just as an FYI to anyone reading this, these instructions are very out of date compared to current CPR guidelines. I would not suggest using them IRL unless for some reason no one else knows what to do and you have no other reference. Less than perfect CPR is better than no CPR at all.

I'm somewhat disappointed that they didn't indicate how to determine "certainly dead". I mean, if someone has no pulse (really, no meaningful electrical cardiac activity), and isn't breathing on their own, that is the clinical definition of death. I don't think there is a point after that where one reaches "certainly dead" as compared to just dead. The determination of "certainly dead" is actually fairly arbitrary, it is simply the point of clinical futility. Clinical futility could be from the second they meet the definition of clinical death, or it could be determined after a period of time where there is no meaningful response to resuscitation efforts, but there really isn't any hard and fast rule. The only time where someone is "certainly dead" are all rather gruesome, obvious, and wouldn't have anything to do with CPR.

 

[mactjaap]

I though

im not sure but I thought I used an Apple IIc monitor for this. Then you have some output. Anyone who can confirm this. It is many years ago.

Also in this thread…. I tested again….

 

[mactjaap]

I used this kind of cable.

 

[Berenod]

Also in this thread…. I tested again….

Unfortunately I do not own an Apple II monitor.
Gonna go through your youtube vids though, one by one

Might learn a thing or two, on all the issues that surely lie ahead of me!

 

[aplmak]

Definitely a recap of the video board is in order. I usually do the trimpots as well. I think the heat from the CRT takes its toll on them. Not sure if John W. may have any in stock. I always do the power supply first.. those lovely cracked RIFAS are just waiting to have their own 4th of July.. lol.. congrats on getting a Lisa!!!

 

[Berenod]

Definitely a recap of the video board is in order. I usually do the trimpots as well. I think the heat from the CRT takes its toll on them. Not sure if John W. may have any in stock. I always do the power supply first.. those lovely cracked RIFAS are just waiting to have their own 4th of July.. lol.. congrats on getting a Lisa!!!

I have a complete videoboard on the way from the US, and a bunch of spares from the UK, including a set of the 6 trimpots (NOS).

Am not doing anything at the moment till I got those spares ove here!

When the stuff arrives, we'll go step by step!

 

[Berenod]

Also in this thread…. I tested again….

Just today got an Apple ][ monitor, so could do a quic test one of the days to see if the video puts anyting out, it won't sync, but should be visible if something is there!

Hope to get the videoboard soon, it's awaiting customs clearing at the moment, since it got sent through Ebay with all taxes paid, it should hopefully clear fast...