Icky wrote: Tue Jan 01, 2019 2:12 am I have a working STFM arriving in the next few days so will try the board out on that one too. If I am still having issues I will send my DVI board to exxos to check on his STFM to see if it is working there.
Problem exists on 520ST and STF Remake so as you say trying on an STFM would be good.exxos wrote: Tue Jan 01, 2019 1:37 pmIcky wrote: Tue Jan 01, 2019 2:12 am I have a working STFM arriving in the next few days so will try the board out on that one too. If I am still having issues I will send my DVI board to exxos to check on his STFM to see if it is working there.
I forgot (Again sorry) what you was using before, think it was the "ST" and STF remake ? So STFM would be good as its what I tried it out on.
The plot thickens - Finally got the new (well new for me) STFM and it was functioning correctly.Icky wrote: Tue Jan 01, 2019 1:55 pmProblem exists on 520ST and STF Remake so as you say trying on an STFM would be good.exxos wrote: Tue Jan 01, 2019 1:37 pm
I forgot (Again sorry) what you was using before, think it was the "ST" and STF remake ? So STFM would be good as its what I tried it out on.
Thats the issue I had...Icky wrote: Fri Jan 04, 2019 5:44 pm One thing though is that I am getting a shimmering on the display on the STFM - will look into that next as well.
At least we are consistent
| ST Model | Revision | Resetting | Shimmering | Comments |
| 520 STM | C070243 REV. E | Yes | No | Rock solid display can be seen if you can get it past resetting and playing a game |
| 520 STFM | C070789-001 REV. C | No | Yes | Shimmering even present playing a game |
| STF Remake | C070789-001 REV. F | Yes | No | Revision is from the donor STFM that gave the remake most of its parts. Seems to exhibit same behaviour as 520ST |
Very odd..Icky wrote: Fri Jan 04, 2019 6:07 pm At least we are consistent
So interestingly from my testing I see the following traits
Out of interest what value did you use?exxos wrote: Fri Jan 04, 2019 9:38 pmVery odd..Icky wrote: Fri Jan 04, 2019 6:07 pm At least we are consistent
So interestingly from my testing I see the following traits
Add this cap and I bet you be working fine...
https://www.exxosforum.co.uk/forum/viewt ... 270#p14777
10nF actually made the board not work - black screen.Icky wrote: Sat Jan 05, 2019 6:46 pmOut of interest what value did you use?exxos wrote: Fri Jan 04, 2019 9:38 pm
Very odd..
Add this cap and I bet you be working fine...
https://www.exxosforum.co.uk/forum/viewt ... 270#p14777
Anything over about 390pF will squash the signal to much. Its not a good fix, but I still suspect its a clocking issue.Icky wrote: Sat Jan 05, 2019 8:06 pm 10nF actually made the board not work - black screen.
47pF works fine.
Screen is now stable on STFM.
EDIT: Just tried the HDMI board back in the STF Remake and 520ST with the 47pF cap in place and its even more temperamental. Some times its just a blank screen like when I used the 10nF when in the STFM and not very often it might try to boot and of course reset. On reset it mostly goes back to blank. I guess the 16MHz line is not so happy in these two machines with the cap on it.
