Re: [M100] Tandy 200 Black Screen

2020-06-19 Thread Stephen Adolph
congrats! always satisfying to sort something like that out... On Fri, Jun 19, 2020 at 9:40 AM ethan saul wrote: > Hi, Just a update. > > My Tandy 200 now works! The problems was that the memory board in the > Tandy 200 is connected by a ribbon cable and when I took it apart the > connector mus

Re: [M100] Tandy 200 Black Screen

2020-06-19 Thread ethan saul
Hi, Just a update. My Tandy 200 now works! The problems was that the memory board in the Tandy 200 is connected by a ribbon cable and when I took it apart the connector must oxidized or gotten dirty which was causing the problem. Since after cleaning it with isopropanol it works, the machine pow

Re: [M100] Tandy 200 Black Screen

2020-06-18 Thread ethan saul
Hi, I unplugged the memory board and removed the motherboard from the case with the grounding shield to do the repair. When I had completed the repair I put the computer back together with the memory board and then powered it on for the first time and it came up with the black screen. Thanks, E

Re: [M100] Tandy 200 Black Screen

2020-06-18 Thread Stephen Adolph
did you happen to unplug the memory board itself? perhaps that cable did not go back together well. I assume you pulled the main board out of the case to do the repair. On Thu, Jun 18, 2020 at 7:00 AM ethan saul wrote: > Hi, > > I have tested the voltages of the memory on the RAM board, Voltage

Re: [M100] Tandy 200 Black Screen

2020-06-18 Thread ethan saul
Hi, I have tested the voltages of the memory on the RAM board, Voltages are around 3.1-3.2V when the computer is powered off and around 5V when the computer is on. I have taken out the Extra memory it have with no luck. The system has no extra rom in it. The flex cable is align in the slot. But

Re: [M100] Tandy 200 Black Screen

2020-06-17 Thread John R. Hogerhuis
Guys please remember to trim the excess content from emails particularly if you are copying something from the digest. -- John. >

Re: [M100] Tandy 200 Black Screen

2020-06-17 Thread Stephen Adolph
one thing to check. did you misalign the flex cable into the connector on the PCB or the monitor? sounds like you buzzed it out though. pretty strange. all you did was change the nicad huh? hmm. Can you check the SRAM voltage? when laptop is OFF it should have ~3.2 V or so. When laptop is O

Re: [M100] Tandy 200 Black Screen

2020-06-17 Thread ethan saul
Hi, Turned the memory power off for one minute and then back on it seem to solve the power button issue but the screen is still the same. Also the voltage of the battery when no power from battery’s or DC jack is around 3.79v. Thanks, Ethan

Re: [M100] Tandy 200 Black Screen

2020-06-17 Thread Stephen Adolph
ging the standard virtual-t output, but any additional > notes and comments would be great to add in! > > Cheers, >Erik > > > On 17 Jun 2020, at 18:10, Ken Pettit wrote: > > > > ?Hi Erik, > > > > I presume you are also referencing the additional M1

Re: [M100] Tandy 200 Black Screen

2020-06-17 Thread Jim Anderson
100] Tandy 200 Black Screen CAUTION External Sender: Do not click links or open attachments unless you recognize the sender and know the content is safe. Hi all, Anyone know anything about Tandy 200 black screen of death? I have changed the CMOS battery and tried a cold start using CTRL+SHIFT+B

Re: [M100] Tandy 200 Black Screen

2020-06-17 Thread ethan saul
0 10:22 AM, Erik van der Tier wrote: > I?m currently merging the standard virtual-t output, but any additional notes > and comments would be great to add in! > > Cheers, > Erik > >> On 17 Jun 2020, at 18:10, Ken Pettit wrote: >> >> ?Hi Erik, >> >> I presume you

Re: [M100] Tandy 200 Black Screen

2020-06-17 Thread B4 Me100
: Wednesday, June 17, 2020 at 1:31 PM To: "m100@lists.bitchin100.com" Subject: [M100] Tandy 200 Black Screen > Hi all, > > Anyone know anything about Tandy 200 black screen of death? I have changed the > CMOS battery and tried a cold start using CTRL+SHIFT+BREAK+RESET. > Wh

Re: [M100] Tandy 200 Black Screen

2020-06-17 Thread Stephen Adolph
Did you double check the polarity of the new battery? If the CMOS battery was flat on install, it will take some time to charge up. It has to be charged or the T200 won't work. ..Steve On Wed, Jun 17, 2020 at 4:31 PM ethan saul wrote: > Hi all, > > > > Anyone know anything about Tandy 200 black

[M100] Tandy 200 Black Screen

2020-06-17 Thread ethan saul
Hi all, Anyone know anything about Tandy 200 black screen of death? I have changed the CMOS battery and tried a cold start using CTRL+SHIFT+BREAK+RESET. When I power it on I hear a click from the speaker and the screen goes black the contrast knob doesn't dim or darken the screen. I have also tr