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AMD Geode/Video 3/Script
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==Measurement == Narrator: "Let's go back and measure the DAC VREF. Again." A glossy red slide shows the text "Let's measure the DAC VREF again!" Narrator: "Here's a microscope shot of the circuit." A microscope photo from above showing the same DAC VREF circuit from before. The text "Here's the DAC VREF circuit" is shown. Narrator: "Here's the components labelled again." Three components are labelled: * A 12nF capacitor * A 1.21k resistor * A 10k resistor * The 1.2v voltage reference The text "Here's each component" is shown. Narrator: "and here are the signal lines labelled correctly" Five lines are drawn over PCB tracks. These connect: * The 1.21k resistor between DRSET and GND * The 12nF cap between DVREF and GND * The 1.2v VREF between DVREF and GND * The 10k resistor between DVREF and 3.3v The text "Here's each signal" is shown. Narrator: "For now let's focus on the DVREF line." Only the DVREF track is shown, and only the 1.2 volts VREF is labelled. The text "Let's focus on DVREF" is shown on screen. Narrator: "DVREF measures 1.2 volts correctly, but" A cartoon multimeter is shown, with its black probe on a GND rail and red probe on the DVREF rail. The text "DVREF measures 1.2V" is shown on screen. Narrator: "Linux drops it to 0.8 volts!" The text "Linux drops it to 0.8V!" in shown on screen. Narrator: "All along I should've measured when the fault was active!" The text "Lesson learned: Measure DURING the fault" is shown on screen. Narrator: "Measuring the 3.3 volt rail shows it's 0.9 volts" The 3.3v rail is shown on screen. The multimeter measures between GND and the 3.3v rail. The text "3.3V rail is 0.9V?" is shown on screen. Narrator: "As a quick check I bridged the 3.3 volt rail to a nearby working rail" A microscope shot of shaky tweezers approaching two components is shown. The first is a capacitor component elsewhere on the board, the other is the 10k resistor in the DAC VREF section. The tweezers touch both components and provide a path for the DAC VREF to get 3.3v. One capacitor is the to connect the 3.3v rail to a nearby capacitor on a separate 3.3v rail is shown. The text "Bridging to a nearby 3.3V rail" is shown. Narrator: "Surprisingly this fixed the brightness" A monitor is shown with cut-off text on it:<blockquote>come to Alpine Linux 3.15 nel 5.16.0-rc2+ on an i586 (dev/tty1) alhost login:</blockquote>The text "The display worked!" is shown. The camera briefly zooms out and shows an orange frog squeeze doll on its back. There's a hole on its underside that makes it look like a gaping butt hole. I didn't need to text describe that but I did. I also can't fix it because I filmed it over a year ago. Narrator: "I checked the other side of the board and found this:" Microscope footage of a circuit board is shown. A yellowed resistor and capacitor are shown next to each other. The text "The other side of the board:" is shown on screen. Narrator: "A blown resistor!" The view zooms in on the resistor, showing a small hole in the middle. The resistor is marked 01Y, meaning 1 ohm! The text "Blown resistor!" is shown on screen. Narrator: "And a yellowed capacitor!" The view zooms in on the capacitor. The text "Yellowed capacitor" is shown on screen.
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