Life expectancy of mine msx computer

Por Rimboeloper

Supporter (2)

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06-02-2018, 14:41

Hey,

I am new on this forum. I have bought an old MSX computer from a colleague for a hundred euros last year. It is a Sony HB-F700P. The computer in question is in good condition. My question to the forummbembers; How long will such a computer function well? The computer in question is now over the thirty years old.

Regards,
Rimboeloper

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Por Meits

Scribe (6044)

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06-02-2018, 18:19

I'm not the right person to answer it because my experience is bad... Several of my (previous) favorite computer got unstable or just died of unknown reasons... I had to stop buying Sony 700s because, well yeah, one wants to have some pleasure of the machine...

I am very sure there are way more positive stories about this computer than mine, and yes, I still think it's a great beast... I just had a lot of misfortune with them (five units orso between 15 and 5 years ago)...

I do hope that yours will serve you very long.

Por Grauw

Ascended (9381)

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06-02-2018, 18:30

I'll say it's good for at least another 30 years! Big smile

Por Samor

Prophet (2054)

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06-02-2018, 18:57

In the early 2k's I found a C64C (yes I know) at some fair, it was cheap (only 5 euros or so) and in a pristine condition, complete with box and everything. Yet for some reason it completely died just one year later, such a shame.

On the other hand I've had other devices lasting me really long. I think it's hard to say in general....

Sometimes there's a bad production run (think the original xbox 360 models, pretty sure almost all of them died already and they were much younger than your average msx Wink), other times it seems to be just a matter of luck....
...I don't know specifically which MSX models are known as super sturdy/durable.

Por Wild_Penguin

Hero (616)

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06-02-2018, 19:21

Impossible to tell, but I certainly hope Grauw is right!

I've had at least one solid-state chip fail without unknown reasons, it was a dead LS367 (Toshiba HX-10 ... I believe there's a thread about it somewhere here). But I presume overall they are quite sturdy!

Electrolytic capacitors might dry out, or worse: leak. I had a HB-75P which had some capacitors in it's power rails practically blown and splattered their content all over nearby components! I wouldn't have known, since the computer was working without (apparent) problems! However I opened it up "just to check", replaced the clearly broken parts and checked voltages afterwards (they are / were spot on ... would have been interesting to try before, but maybe there would not have been any difference, since these just "even out" the current demands from the perspective of an amateur electronics hacker =) ). Luckily those components are on separate small PCBs (can not make that much damage) and were easy to replace (IIRC I only replaced the electrolytic capacitors C6&7 in the service manual)

So, it never hurts to open it up and look around if there are any obvious defects. If it breaks, with proper equipment and skills (not me!) these machines are often repairable!

EDIT: And welcome to the forum! ;)

Por WORP3

Paladin (809)

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06-02-2018, 20:12

Most components can just be replaced or in other words, all msx computers can be repaired. I guess we still have to see if eproms will make it another 30 years...

Por Meits

Scribe (6044)

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06-02-2018, 21:01

Got some emproms in my Frankenstein MSX. My guess is they're still fairly new since its mainboard was modded little over four years ago. But if they lose their content I think I go for flashroms instead.

Por msxholder

Champion (345)

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06-02-2018, 22:18

The problem of those machines are the msx engine they are no where for sale (New).

Por Grauw

Ascended (9381)

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06-02-2018, 22:27

But how often do you hear of the MSX Engine breaking down? It’s pretty rare, I think.

(And if it ever becomes a common occurrence, a CPLD replacement seems feasible.)

Por msxholder

Champion (345)

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06-02-2018, 22:37

Right but all of the MSX 2+ and most MSX 2 have no buffers (ïnbetween ic's) and I have seen at least 10 dead.
As for a cpld replacement or repair a fysiek adaptor is needed.

Por Samor

Prophet (2054)

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06-02-2018, 22:41

I was recently reading about a German who tries to do this for the SID chip in the C64 (those chips are literally becoming extinct by now).

http://www.fpgasid.de