Need help pointing to strange video problem on SE/30

[uniserver]

looks like I have another case of Diarrhea Screen.



what were the pins to fix this again?

UK6 ## to ???## forgot.

hey check out these hill billy ram slots, they broke apart right when i tried to install a ram slot.

 

[uniserver]

Ok i fixed it.

I copied genie_mac's image and it works.

Just like 68kbits did as well.

I made a few changes to genie_mac's image

 

[uniserver]

Last one on by list...

No bong,

no boot,

no boot floppy/?

just this:



Could maybe this one be a network filter issue?

 

[mcdermd]

Looks and acts just like the board you sent to me to have a look at. All 64 of the ROM connections look good. All of the caps and connections from them are good.

 

[uniserver]

hey maybe we should change the resistor networks and see if that helps my good man?

i know that is a issue, but that is about all i can shot gun right now , i know techknight has one of JDW's boards that is doing something like this to.

Can you do that good buddy…? I don't have any networks right now.

i could remove some from that se.30 parts board but that is extra annoying.

Also i think the one you have has a different video pattern on the screen, can you post a picture of that one's screen?

 

[mcdermd]

I'll see what I can do in the next couple of days.

 

[NJRoadfan]

hey check out these hill billy ram slots, they broke apart right when i tried to install a ram slot.[attachment=1]Screen Shot 2013-09-16 at 9.43.30 PM.png[/attachment]

Looks like its time for some new SIMM slots all around. That cap leaked pretty bad too.

 

[uniserver]

i think the cheapest i saw networks for was 1.68 a piece but you had to buy 20.

yeah for sure on those ram slots. never had slots break apart like that on me.

the leaky cap goo really tore this board up. - The funny thing is, now i have it all patched up it works great.

hey mcd, not sure if you wanted to do JDW's too.. i know techknight is mega busy these days

if you fixed them you would be the man and the hero!

 

[James1095]

It's pretty easy to test resistor networks, I wouldn't go replacing those unless the ones you have are bad. Usually checking them in circuit will give you a pretty good idea. Comparison with a working board will remove any doubt.

 

[techknight]

Its not the resistor network, at least not on JDW's board.

Check the ROM Select function from the GLU. Make sure the ROM is getting moved to 0000 on boot, JDWs is not. Why? bad GLU or possible bad co-processor preventing the main processor from running.

What we need is get bbraun or doug3 to make a custom firmware that boots the machines and tests all addressing/hardware functions primitively, and flash an LED a code where it fails.

 

[bbraun]

The ROM kinda has that already builtin with the diagnostic mode. Grounding the VIA1 pin should work on the SE/30 too.

 

[techknight]

I'm Not aware of diagnostic mode?

 

[uniserver]

oh wow ...

I would assume then you get a dump to the serial port?

Techknight do you have one of Dougg3's rom simms?

 

[bbraun]

Diagnostic mode

There's also a way to enter diagnostic mode via SCSI, I just haven't gotten to looking at that yet.

 

[techknight]

That makes life easier....

 

[genie_mac]

Hi,

as requested, this may be of interest to people troubleshooting SE/30 SCSI issues.

Wires ran to replace rotten VIAs.

 

[uniserver]

Boom, thanks! I just fixed a SCSI issue with your picture genie!

you are the man. :approve:

I am telling you guys… most of these se/30's go bad in the SAME WAY.

awesome!

 

[genie_mac]

Good stuff! Have you actually kept track of the number of SE/30's that you have fixed? Would be cool to know. Must be a lot of them now

 

[uniserver]

Yes so far at-least 5 se/30s have been shot gun diagnosed / fixed that I know of. either directly by me or indirectly from me sending links to your pictures!

Saves time buddy!!

Ones I have actually fixed with schematics and meter and wasting hours and hours. I have lost count by now many many

Recapped at least around 60+ just SE30's by now with about 65 to 70 % being fixed just from a good wash and new caps, And the rest 30 to 35 % needed additional bench work, and I would say out of all that there has been only about 6 boards total I could not fix, 4 of those are what I'm sending you 1 went back to customer an probably ended up on the wall , the other was cc333s parts board on my floor lol, I have rescued like 5 boards from the parts of that, Adb fuse/ Adb filter / network filter / ue8 / scsi chip! I used the swim from it too but turned out it wasn't bad.

Total Mac boards? Wow no clue tons!

Se/30 boards seems to me, most likely to need more then caps, when sent in for a recap!

 

[CC_333]

the other was cc333s parts board on my floor lol, I have rescued like 5 boards from the parts of that, Adb fuse/ Adb filter / network filter / ue8 / scsi chip!

I'm glad my board has been useful to you!
It was a shame when I botched the ROM and RAM SIMM slots; it worked okay before...

Oh, well, it worked out...

c