I was worried that the AT PSU of my irreplaceable 486 contained bad capacitors and I opened it up to take a look. The two big ones were Nippon Chemi-Cons (picture 1) but all the small ones were labeled "Chton" or "Cnton" or something similar (picture 2). I have no idea if these caps are good or bad and I wonder if anyone here could identify them for me. The PSU is made in Taiwan by Ya Hsin.
The PSU also happens to be over 20 years old. Even if all the caps would turn out to be of high quality, should I replace the caps pre-emptively despite none of them showing any outward signs of failure?
The computer is somewhat erratic in that it fails to detect the hard drive if I reboot it more than three times and in that it only accepts two 8 mb sticks of RAM. It becomes unstable if I insert four sticks or use DIMMs of 16 mb or higher. The motherboard has no electrolytics whatsoever, so I figured that perhaps the PSU was at fault...
The PSU also happens to be over 20 years old. Even if all the caps would turn out to be of high quality, should I replace the caps pre-emptively despite none of them showing any outward signs of failure?
The computer is somewhat erratic in that it fails to detect the hard drive if I reboot it more than three times and in that it only accepts two 8 mb sticks of RAM. It becomes unstable if I insert four sticks or use DIMMs of 16 mb or higher. The motherboard has no electrolytics whatsoever, so I figured that perhaps the PSU was at fault...
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