Gregert Beardrondo
Member
Well a few weeks ago when I turned on the good old 5150 to try and ping 127.0.0.1 to test the NIC, instead of the cursor flashing while I held my breath, nothing happened.
Not nothing: The monitor whined quietly, too high for my mother to hear it.
So after a few days I got up the courage to take the back off. Don't worry, I was careful not to touch any capacitor contacts (including the tube itself). There were several things that looked like they might be causing the problem. All the capacitors appear fine, and since I don't have a way to test them I'm going to assume they are fine. But J7 (just a wire soldered to two points) and R514 both are very corroded. This past weekend I saw that Canadian Tire had a multimeter on sale for $9.99 (80% off!). I couldn't pass this up, so my father and I went and bought one on the way to Union Station.
After some poking around with it set to measure resistance, I've found that R514 appears to be corroded to the point of infinite resistance. It is open. It must be replaced.
So I come before you to ask: What is the value of this resistor? Or does anyone have a schematic? Perhaps a link?
Not nothing: The monitor whined quietly, too high for my mother to hear it.
So after a few days I got up the courage to take the back off. Don't worry, I was careful not to touch any capacitor contacts (including the tube itself). There were several things that looked like they might be causing the problem. All the capacitors appear fine, and since I don't have a way to test them I'm going to assume they are fine. But J7 (just a wire soldered to two points) and R514 both are very corroded. This past weekend I saw that Canadian Tire had a multimeter on sale for $9.99 (80% off!). I couldn't pass this up, so my father and I went and bought one on the way to Union Station.
After some poking around with it set to measure resistance, I've found that R514 appears to be corroded to the point of infinite resistance. It is open. It must be replaced.
So I come before you to ask: What is the value of this resistor? Or does anyone have a schematic? Perhaps a link?
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