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  • VintageVic's Avatar
    Today, 03:25 AM
    yes, that is the way. put one chip from bank 1 -> to bank 0. Boot, and see, if you still have 256k. If yes, that chip was ok. If the chip is...
    20 replies | 337 view(s)
  • VintageVic's Avatar
    Yesterday, 10:16 PM
    have you ruled out issues with power supply? Is the hard drive spinning - maybe it will give a hint ? Did you try the burned bios eepproms on...
    2 replies | 32 view(s)
  • VintageVic's Avatar
    January 15th, 2020, 12:32 AM
    No one seems to remember "Spider". Well, like said, the name of the game might have been something else too. The search for original "Spider" is...
    1 replies | 263 view(s)
  • VintageVic's Avatar
    January 14th, 2020, 05:57 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Heh, when all else fails, replace the lower system board. if that fails, replace the upper one :). If only it was that easy to come up with working...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 14th, 2020, 05:43 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Thank you DeltaDon for the links. I don't exactly see the same symptoms. I see long - dot - dot - dot and then pause. That is curious, it would...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 13th, 2020, 10:50 PM
    I had Amstrad CPC 464. Locomotive basic 1.0 in that computer did support graphics. https://en.wikipedia.org/wiki/Locomotive_BASIC...
    27 replies | 3114 view(s)
  • VintageVic's Avatar
    January 13th, 2020, 06:58 PM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Good early morning! I think that suspicious area between toshiba and flash chips was due to light reflection. There is a black stamp there,...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 13th, 2020, 09:57 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Thanks for asking, DankEngihn! I got back home today and wanted to check this again. I found five fuses, that were all ok. Which is kind of...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 13th, 2020, 05:56 AM
    I can only say from my own user experience, that I really liked to be freed from using line numbers and about the ability to call subroutines by...
    27 replies | 3114 view(s)
  • VintageVic's Avatar
    January 13th, 2020, 03:41 AM
    https://www.ebay.com/itm/50pcs-4164-KM4164B-KM4164B-10-DIP16-In-Stock/163286865943?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649 I...
    2 replies | 154 view(s)
  • VintageVic's Avatar
    January 10th, 2020, 11:31 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    ahm, a bit shamed to say that that's right. I once had shorted tantalum cap in 1541 drive and removing it enabled the drive to boot. But, as said...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 10th, 2020, 09:58 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Thanks DeltaDon for your input! I did remove the two light blue caps. My eyesight is so bad that I can't really see if they are bulged or not, but...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 11:46 PM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Just found out information that there is a 5amp fuse on the lower system board and 2 amp fuse(s) on the higher system board. I have not checked...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 11:07 PM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    I found out from t1900c maintenance manual about the batteries. RTC battery is in fact that rechargeable 3V lithium battery. I connected it and...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 12:33 PM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    first no psu, while I gave 12V to the battery leads on the mobo. I did try also giving both, 19V psu (to the pwr connector) and 12V to battery...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 12:25 PM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Right! No worries, I gave it a go, connected +12 to the far left (on motherboard) and ground to far right. -> still the same behaviour with the...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 11:56 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    That might not be a bad idea to try! wow... but let me take a moment to figure out how to connect 12V to five contacts :). There is 0,45 Volts...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 11:47 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Yeah, I was a bit suspecting, that my simple multimeter is not up to the task to measure ESR. I might not be either, heh heh. I could just pull...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 11:42 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    I unplugged the screen and no change in the DC IN led behaviour (one long + three short blinks repeating). from t1900c maintenance manual it is...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 11:19 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    ah, I see. Thank you for explaining this out. Yes, all the boot attemps I described here today I did with the two boards only + charger. ...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 10:41 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    I cant see any electrolytic caps on the motherboard. I'm quite novice with electronics, is it possible to measure ESR with just multimeter ?
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 09:51 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    So, I decided to take the laptop apart. On the way to possible cause (electrolytic caps), I checked internal batteries.
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 9th, 2020, 05:09 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    Thanks all for your input! I have not yet opened and checked, if there are leaked caps inside. Very likely there are, if the laptops are not...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 8th, 2020, 03:13 AM
    I had pretty similar path than you. Moved from limited VIC-20 basic to CPC 464 / Locomotive basic. Loved to learn with it and really liked, that I...
    27 replies | 3114 view(s)
  • VintageVic's Avatar
    January 7th, 2020, 08:46 AM
    VintageVic replied to a thread Toshiba T1900C in Later PCs
    I found 19V power supply (Toshiba requires 18V). With it, I do get green led (DC IN) on. Battery led is blinking orange. Very obviously the battery...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 7th, 2020, 02:25 AM
    Stone had a good point - dirty discs or dirty drive head has caused a lot of trouble for me with commodore floppies. Drive may read the disc well...
    17 replies | 638 view(s)
  • VintageVic's Avatar
    January 6th, 2020, 08:37 AM
    Just a huntch, but your troubles begun after you tried to add second drive to your 5150. After that you have been unplugging the drives. What if...
    17 replies | 638 view(s)
  • VintageVic's Avatar
    January 4th, 2020, 06:19 AM
    VintageVic started a thread Toshiba T1900C in Later PCs
    Went today to old school building in Varkaus, Finland. Building is going to be demolished next week and they were giving away all furnitures and...
    39 replies | 939 view(s)
  • VintageVic's Avatar
    January 3rd, 2020, 12:07 AM
    While I was assembling the 386 to the at desktop, I noticed, that fan in the power supply had retired. I tried to rotate the fan, but its bearings...
    12 replies | 606 view(s)
  • VintageVic's Avatar
    January 2nd, 2020, 10:02 PM
    Ha ha! That explains it then :)
    12 replies | 606 view(s)
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About VintageVic

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About VintageVic
Biography:
Friendly guy, born in 1976
Location:
Finland
Interests:
Commodores and Vintage PC:s in general
Occupation:
IT enginer

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