Fixing a PC that won't turn on (Bonus magic smoke!)

Рет қаралды 134,858

5 жыл бұрын

My IBM PC Model 5150 decided to just "turn off" while it was running. In this video, I go through the troubleshooting steps to help you isolate what is wrong, locate the fault and repair it. (And it's not a bad power supply.)
Link to my friend Dave's channel: / mrdavejustdave
--- Tools
Deoxit D5:
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Jonard Tools EX-2 Chip Extractor:
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Wiha Chip Lifter:
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O-Ring Pick Set: (I use these to lift chips off boards)
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Elenco Electronics LP-560 Logic Probe:
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Hakko FR301 Desoldering Iron:
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Rigol DS1054Z Four Channel Oscilloscope:
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Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier:
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TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
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TS100 Soldering Iron:
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EEVBlog 121GW Multimeter:
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DSLogic Basic Logic Analyzer:
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Magnetic Screw Holder:
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Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
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RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
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Plato (Clone) Side Cutters: (order five)
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Heat Sinks:
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Little squeezy bottles: (available elsewhere too)
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Пікірлер: 442

@pvc988 5 жыл бұрын

5.150V What a fitting voltage for that machine.

@philiphoeffer7442 5 жыл бұрын

OL stands for OPEN LINE. Not OVERLOAD :)

@Ice_Karma 5 жыл бұрын

I believe the original IBM PC floppy format was actually 160 kB, single-sided, 40 tracks, 8 sectors per track, until someone, I can't remember who-maybe Tim Paterson?-was looking at the floppy controller specs and the way IBM was configuring it, and realized it would be easy to squeeze a ninth sector in, increasing the single-sided capacity to 180 kB, and the double-sided capacity from 320 kB to 360 kB. (For what it's worth, it was actually easy to squeeze a

@BEdmonson85 5 жыл бұрын

Well, according to Louis Rossmann, you can't have too much wrong... you got fan spin! 🤣🤣🤣

@LanceHall 4 жыл бұрын

That's not a capacitor it's an electronic tick.

@thiesvanderkooij8421 4 жыл бұрын

That looks like a microwave.

@_to_dream_or_not_to_dream 3 жыл бұрын

I notice that you are a lot more detailed in explaining stuff in your older videos. All your recent videos are rather lacking in important/useful info, and instead there's Haribo with toxic ingredients and Rammy the god of excess RAM sticks.

@boowh1 4 жыл бұрын

Will it play Quake

@PJBonoVox 5 жыл бұрын

Saw 'smoke' in the title and clicked. Can't help myself.

@AndruRomin 5 жыл бұрын

Way to throw a temper tantalum...🤔

@andrewobrien3973 5 жыл бұрын

Funny to think my grandfather was part of the design team behind that power supply. Glad to see its still holding up :)

@crowbarviking3890 4 жыл бұрын

My dad who was an Engineer in the 80s used to say

@rymixxx 3 жыл бұрын

Oh man, you just seem like the nicest person. Keep doing what you do. I thoroughly enjoy going on this retro tech adventure with you.

@indylmc 5 жыл бұрын

I can't believe you figured that out. Back in the day (40 years ago) when I worked on electronics I never had any luck at component troubleshooting. Replacing the board was the way I went. Good for you by the way, that is not by any means, easy to figure out.

@50shadesofbeige88 Жыл бұрын

Classic ADB. its crazy to think I've been watching for 4 years!

@robertoneill1979 4 жыл бұрын

I used to work at In-Circuit Test debugging IBM AT motherboards. For tracing shorts we had a gadget we called a "toneohm"; basically a very sensitive ohmmeter which emitted a tone, the pitch of which would get higher as you closed in on the shorting component. Really helped with tracking down those pesky shorts.

@ObiWanBillKenobi 2 жыл бұрын

This is a textbook example video of how to track down and bullseye the fault of a vintage computer not turning on. Thank you! I had the exact same symptom and solution to a vintage computer last year.

@jaykay18 5 жыл бұрын

The way I always learned was "Red to red, you're dead. Black to black, no flak."

@edward_grabczewski 3 жыл бұрын

Thanks for taking the time to explain your troubleshooting logic. Most people gloss over that and leave viewers confused!

@jaycee1980 5 жыл бұрын

As soon as I saw those dipped tantalums i thought "One of those buggers". They were used mainly because they had low ESR compared to electrolytics of the time. Nowadays we have low ESR electrolytics and you can just substitute them. MLCC ceramics are very low ESR as well but are also highly voltage dependant, so its usually not a good idea to substitute them in