AMD Geode/Video 3: Difference between revisions

Latest revision as of 06:59, 30 December 2023

This page is about the Repairing an AMD Geode: Part 3 video.

This video is about how I messed up, and fixing VGA brightness.

See AMD Geode/Video 3/Script for a textual description of the video.

Footage was shot from March 2022 through July 2023.

Editing was started on July 2023 and ended December 30 2023.

Workflow[edit | edit source]

I attempted to save my time and sanity by editing and subtitling the video first while writing the script then recording the voice over last. As a rule of thumb it seems each line of narration tends to be around 4 seconds.

I did attempt to produce the video in Blender but quickly went back to Kdenlive and Inkscape.

I did the subtitles during editing with Kdenlive and also smothered a lot of text on the video so it can be watched without subtitles.

In the end it seemed the format of the video was very similar to a slideshow presentation, but with a separate script and video elements. Maybe next video I should try to use a slideshow program that can export to HTML or something, then use Kdenlive to stack it together and add some videos.

Overall progress[edit | edit source]

Done[edit | edit source]

Chapter: Accessibility notice
Chapter: Recount
Chapter: Lessons learned
Chapter: Writing code
Chapter: Measurement
Chapter: Repair
Chapter: BIOS editing
Chapter: Ethernet removal
Proof read: Accessibility notice
Proof read: Recount
Proof read: Lessons learned
Proof read: Writing code
Proof read: Measurement
Proof read: Repair
Proof read: BIOS editing
Proof read: Ethernet removal
Chapter: BIOS flashing
Proof read: BIOS flashing
Chapter: Credits
Proof read: Credits
Voice over

@@ Line 1: / Line 1: @@
-Video 3 will be about how I messed up, and fixing VGA brightness.
+This page is about the [https://www.youtube.com/watch?v=tg0Zq2urKWc Repairing an AMD Geode: Part 3] video.
-== Outline ==
+This video is about how I messed up, and fixing VGA brightness.
-Mention failure:
-*Soldering failed, but that's not very interesting: My understanding of the circuit was wrong
+See [[AMD Geode/Video 3/Script]] for a textual description of the video.
-*I thought the capacitors were inline with the circuit
-*Removing them successfully would not have given me signal access
-*I would've realized this if I checked the caps were connected to GND
-*Replacing the inductors weren't technically necessary either
-*Resistance and diode mode would show shorts or pull-downs
-*Would it happen on all three lines?
-Writing code:
-*Entering test mode gives a blank screen
-*Datasheet seems wrong: "MBD_MSR_DIAG[18:16] = 101h" should be "MSR_DIAG_VP[18:16] = 0b101"
-*DAC status registers always say the DAC is below 0.35V
-I did what I should have done in the first place: Measured when the display WORKS!
-*The DVREF shunt looks okay and produces the correct voltage
-*The DVREF shunt has a 12nF cap in parallel
-*The DVREF shunt has 13k to the 3V3 rail
-*The DRSET resistor is 1.21K to GND
-*The VGA resistors seem fine and correct values
-*When external DVREF is used, the shunt drops to 800mV, the rail somehow drops to 960mV
-Editing the DVREF required source code hacking? DVREF stuff
-Shorting between an existing 3.3V rail nearby caused the screen to suddenly display in full brightness.
+Footage was shot from March 2022 through July 2023.
-I followed the rail and found a blown resistor, but I also wondered if the capacitor was somehow draining. So I removed both. This wasn't a completely correct fix: The bypass capacitor is in parallel to the circuit, it couldn't drop voltage like this normally. Had I measured it I could've confirmed it was 3.3V. The voltage drop here is 2.34V! So there's some in series resistor that must be dropping voltage based on current or use. The burned resistor looks like a good candidate.
+Editing was started on July 2023 and ended December 30 2023.
-At this point I believe the DAC is working, so the problem might be related to clocking.
+== Workflow ==
+I attempted to save my time and sanity by editing and subtitling the video first while writing the script then recording the voice over last. As a rule of thumb it seems each line of narration tends to be around 4 seconds.
-I added in a fresh clock battery and it had no effect.
+I did attempt to produce the video in Blender but quickly went back to Kdenlive and Inkscape.
+I did the subtitles during editing with Kdenlive and also smothered a lot of text on the video so it can be watched without subtitles.
+In the end it seemed the format of the video was very similar to a slideshow presentation, but with a separate script and video elements. Maybe next video I should try to use a slideshow program that can export to HTML or something, then use Kdenlive to stack it together and add some videos.
+== Overall progress ==
+=== Done ===
+* Chapter: Accessibility notice
+* Chapter: Recount
+* Chapter: Lessons learned
+*Chapter: Writing code
+*Chapter: Measurement
+* Chapter: Repair
+* Chapter: BIOS editing
+* Chapter: Ethernet removal
+* Proof read: Accessibility notice
+*Proof read: Recount
+*Proof read: Lessons learned
+*Proof read: Writing code
+*Proof read: Measurement
+*Proof read: Repair
+*Proof read: BIOS editing
+*Proof read: Ethernet removal
+*Chapter: BIOS flashing
+*Proof read: BIOS flashing
+*Chapter: Credits
+*Proof read: Credits
+*Voice over
+[[Category:Projects]]