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NanoPEB is not always recognized.


Pepper
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Another option is to reseat the cardreader on the board, or to change it (I once got them for less than 10eu on eBay)

Ok, thanks. I found one on eBay for $6. Hopefully that'll fix the issue. I did notice that it does not read the CF when the TI is powered up. It used to. Is this a common issue for the NanoPEB?

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Ok, thanks. I found one on eBay for $6. Hopefully that'll fix the issue. I did notice that it does not read the CF when the TI is powered up. It used to. Is this a common issue for the NanoPEB?

 

For me, it is a common issue. I "repaired" some by changing the cardreader...

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For me, it is a common issue. I "repaired" some by changing the cardreader...

 

You might be onto something ;) .. I found a sticker on the underside of the CF reader saying "Bad"... Got to love eBay used purchases!

 

post-61939-0-81203700-1508076710_thumb.jpg

 

Also, I have an extra wire soldered onto the main board. I don't see it in other pictures of the NanoPEB. It looks to be passing a Ground connection from ^7 on the 74HC000 to the console connector. Should it be there ?

post-61939-0-24770700-1508076738_thumb.jpg
Edited by Pepper
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I was having this same exact issue on one of the Nanos I had. The solution for it was to remove the PLCC's, clean and reseat them.

I used 1000 grit sandpaper to remove any oxidation that could have formed. Once that was done I was amazed to find that it was in perfect operating condition. In the end I still got rid of it, because to me Nanos are the most nerve wracking things I've ever owned.

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Anyone suggested cleaning the side port contacts yet? Something like cotton swabs and isopropyl alcohol, or maybe a small abrasive rubber if there is room.

I'll give that a go tonight.

 

@--- Ω --- , The PLCC's are soldered directly onto the board. So reseating is not an option.

 

I'm also going to try another power supply.... just in case.

 

We'll get there !

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Hmm, good to hear. Not only does it reduce cost for him, it eliminates another problem area. I wonder how long he's been doing it that way. I wish you luck.

Yep, but not so easy to replace components ;)

I agree with you on the nerve wracking part of the nanoPEB. But as the real PEB costs seem insane these days.... I guess I'll deal with it.. If I ever get it working. I really only want it for the memory expansion and rs232 so I can use it to access my BBS and others.

 

Sent from my Pixel XL using Tapatalk

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I took my 12v regulated Bench power supply and dropped the voltage down to 5V with a DC-DC Buck converter. Still the same symptom. So that rules out the PSU as that's been 3 different sources.

Cleaned the sidecar board contacts with some fine sandpaper. No joy.

It's not going to beat me ... well hopefully not ..lol.

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  • 2 weeks later...

Have you tried another power socket in the house (e.g. preferable a different circuit). I had 2x nano-PEBs which normally worked without a problem,

then I did not use them for 6-8 months (in a hot / humid environment) and could not get them to work, but I connected it to a power strip extender

(and not sure if that supplied enough power supply or current to all devices connected to it). I moved to another location, still the same problem,

but I kept trying and I got one to work again (also swapping the CF-card), the SAN-Disk CF-card works the best, the Kingston CF-card did not work.

 

Maybe the CF-card is the problem? Check on the PC (or do a complete reformat and put all files back with TI-99-Dir)

(I still need to troubleshoot the other one if I can get it back again, I ran everything on 600mA and now have a cable for 2A and phone-USB 5V adapter)

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Have you tried another power socket in the house (e.g. preferable a different circuit).

 

Yeah, I tried all of the above. New CF card, reformatted and loaded the vol1 back onto it, etc.

I ended up returning it to the person I bought it from. I suppose, It's not beyond the realm of possibilities that it's my TI that's the issue. Not the NanoPEB.

As I only have one working TI99/4A, I did not have anything to test against. When I get my spare unit working then maybe I'll purchase another NanoPEB. Until then I have plenty of other projects to keep me busy.

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Yeah, I tried all of the above. New CF card, reformatted and loaded the vol1 back onto it, etc.

I ended up returning it to the person I bought it from. I suppose, It's not beyond the realm of possibilities that it's my TI that's the issue. Not the NanoPEB.

As I only have one working TI99/4A, I did not have anything to test against. When I get my spare unit working then maybe I'll purchase another NanoPEB. Until then I have plenty of other projects to keep me busy.

 

I had similar issues and it turned out to be the PS. I think it's very sensitive to regulation.

On a side note, I see that you have the PiDP-8 kit :) I built one myself and I have it running Seti@home 24/7 :grin:

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On a side note, I see that you have the PiDP-8 kit :) I build one myself and I have it running Seti@home 24/7 :grin:

Yes, I have the PiDP8/i running a Mystic Telnet BBS. I also have the "blinkin lights" going ;)

I occasionally play Adventure on it also.

I'm looking forward to building his PDP11 clone when that comes out.

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