Short on 12V or 3.3V rail on Turing (RTX 2000) GPUs Repair: Difference between revisions
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(Created page with "{{stub}} {{Repair Guide |Device= |Affects parts= |Needs equipment= |Type= |Difficulty= }} ==Problem description== When the card is not turning on at all, causes the entire computer not to turn on. Caused by a shorted component on 12V or 3.3V rail. thumb|Possible shorted components for 12V_BUS on a FE 2080. Front side (Figure 1) ==Symptoms== * Sub 100 Ω on the 12V_Bus, 12V_EXT, or 3.3V_BUS. * Computer won't power on or instantly...") |
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Revision as of 21:50, 7 November 2023
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Short on 12V or 3.3V rail on Turing (RTX 2000) GPUs Repair | |
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Device | |
Affects part(s) | |
Needs equipment | |
Difficulty | |
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Problem description
When the card is not turning on at all, causes the entire computer not to turn on. Caused by a shorted component on 12V or 3.3V rail.
Symptoms
- Sub 100 Ω on the 12V_Bus, 12V_EXT, or 3.3V_BUS.
- Computer won't power on or instantly shutting down upon pressing the power button.
- Fans not spinning (in case of blown fuse).
Solution
Diagnostic Steps
- Identify which rail is shorted by measuring the resistance of each. Turing GPU Diagnosing Guide here you can find points to measure from
- Inject 1V 10A to the shorted rail
- Check with thermal camera or isopropyl alcohol for hotspots, all possible shorts are in the attached photos.
- In the case of 12V short, make sure to measure VCore voltage while injecting, if you read any voltage higher than 0.1V then a MOSFET is likely shorting 12V to the GPU then to GND.
- If this is the case, remove the ground power supply lead and connect it to VCore. Then identify the shorted MOSFET/Power Stage.
Repair Steps
- After the shorted component has been identified, remove it.
- If the short is still present, repeat the diagnostic steps until you find the other shorted component.
- If the short is gone after removing the component, replace it.
- In the case where the shorted component was a MOSFET and after replacing it shorts again immediately, replace the controller/driver for this MOSFET.