Blizzard 1230/50 MKIV problem (Black Screen)

[EnyGmaTiK]

I was wrong, it's indeed 25W ( i don't know where i've seen 20W  :-P )

230~240V ~ 300mA 50Hz

Output:

+5v ~ 3.0A
+12v ~ 500mA
-12v ~ 100mA

That is the specs of the PSU

[Brian]

Still it don't prove that there's power enough. If you can't get hold of an A500 PSU then try get hold of an old AT trafo. On the motherboard powerplug connect orange (PowerGood) to yellow (+12v), then connect one of the diskdrive power connectors to the diskdrive and another one to the motherboard.

I burned a 50W A500 PSU by running my A1200 with 2 external diskdrives, one 3.5" Harddrive and a Blizzard1230III (though it did take some time). So don't write of the card before you are sure it's not a power issue.

[EnyGmaTiK]

I was wrong, it's indeed 25W ( i don't know where i've seen 20W  :-P )

230~240V ~ 300mA 50Hz

Output:

+5v ~ 3.0A
+12v ~ 500mA
-12v ~ 100mA

That is the specs of the PSU

[EnyGmaTiK]

Brian wrote:
Get hold of an old AT trafo. On the motherboard powerplug connect orange (PowerGood) to yellow (+12v), then connect one of the diskdrive power connectors to the diskdrive and another one to the motherboard.

Can you explain this bit better?

[EnyGmaTiK]

Brian wrote:
Get hold of an old AT trafo. On the motherboard powerplug connect orange (PowerGood) to yellow (+12v), then connect one of the diskdrive power connectors to the diskdrive and another one to the motherboard.

Can you explain this bit better?

[Brian]

The ordinart AT PSU you find in older PC's have 2 flat connectors, with 6 pins in each, that powers the motherboard. One of these connecotr have an orange (Power Good) and a yellow whire (+12V) and you need to connect these two whires together in order to get the PSU to work.

Then you should find some power connectors on the PSU that goes to harddrives and diskdrives (you should have 2 power connectors for diskdrives, though there are quite a few PSU with just one). Connect one of them to the diskdrive so it have power, then connect the other to the motherboard so it get more power. Then power up both the AT PSU and the original PSU at the same time.

[EnyGmaTiK]

I sucessfully modified an AT PSU, but the problem persists... black screen  :-(

[Brian]

Then it shouldn't be a powerproblem... Can you try the card in another A1200 to see if the problem continue there cause then it's likely a dead CPU card and time to contact the seller I think.

[EnyGmaTiK]

I can't reach other A1200... As for the board being dead... hope not  :-(

[Framiga]

Hi EnyGmaTiK,

try to insert the card NOT fully (only at 70-80% or so).

We have a Blizzard that works only in this way.

Ciao

[EnyGmaTiK]

I think at this point i've tried everything...

I think i've got a dead blizzard...  :-(

[EnyGmaTiK]

I think at this point i've tried everything...

I think i've got a dead blizzard...  :-(

[PiR]

Don't panic yet.
I used to have that card.
I belive it is able to work only with memory on-board.
So ether you have wrong SIMM or no SIMM at all it will refuse cooperation.

BTW. I didn't know about problems with EDO at that time and I've bought one that appeared to be EDO, but luckilly for me it was working for me.

Good luck

[EnyGmaTiK]

I've been asking the same questions of another board, and there they told me, that this accelerator ( actually all accelerators ) work without a SIMM... i just don't know now  :-(

[Stedy]

Hello,

A good thing to try, it to clean the A1200 CPU slot connector and that of the card. Isopropyl Alcohol (used in tape head cleaner fluid ) on a cotton bud, rub it across the A1200 motherboard connector for the card.

If you can get some contact cleaner, spray it into the connector of the Blizzard 1230.

Ian

[patrik]

@EnyGmaTiK:

There are two jumpers on the card. One for the ramspeed and one for MapROM. Make sure the MapROM feature is disabled as you havent got a SIMM installed. There should be instructions for the jumpers printed on the card.


/Patrik