The GPU REPAIR GUIDE. How to fix GPU /Graphics card not detected. AMD Radeon or Nvidia
Learn Electronics Repair #142
THE GPU REPAIR GUIDE - Divided into chapters, English Language
0:00:00 CHAPTER 1 - INTRO
0:01:56 CHAPTER 2 - ESSENTIAL TEST EQUIPMENT AND TOOL (PLUS SOME NICE TO HAVE)
0:18:38 CHAPTER 3 - THE LINE-UP OF SUSPECT GPUs
0:22:54 CHAPTER 4- VISUAL INSPECTION
0:31:55 CHAPTER 5 - RESISTANCE MEASUREMENTS
1:10:09 CHAPTER 6 - VOLTAGE MEASUREMENTS (THEORY ** IMPORTANT)
1:39:28 CHAPTER 7 - VOLTAGE MEASUREMENTS (PRACTICAL)
2:02:49 CHAPTER 8 - THE LIGHTS ARE ON BUT NO-ONE'S HOME
It takes a lot of time and effort to make Youtube videos. If you enjoy my videos or they helped you with your own repairs please consider subscribing to my channel or click LIKE
If you would like to help support this channel you could consider sending a donation or subscribing to my patreon page. All monies received will go towards buying more items to repair and make interesting videos, or to improve my video recording equipment and will enable me to spend more time making better videos
You can send donations via this link
https://www.paypal.com/paypalme/youtubeLER
You can subscribe via this link
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Errata 0:40:39 - this pin is connected to ground on the ATX PSU but it is not connected to ground on the GPU - it is a sense pin to detect if an 8 way plug is inserted
Errata 0:43:25 - 12V not 5V
Errata 0:48:44 - Yes I know, I am trying to probe the coil in the wrong place!
Errata 0:52:25 - We also need to test shorts to the coils from the 12V on the PCIe connector
Errata 0:56:20 - and this is why you need to check ALL the phases of the VRM for shorts to ground. It could be possible to have a short on just this phase.
Errata 0:59:45 - The memory controller (which reads short) is part of the GPU
Errata 1:04:06 - it is also common to find a coil in this area which is actually a filter for the 12V PCIe supply, and not a buck regulator coil. In that case it will connect to the 12V PCIe and likely (to give you a clue) to have a 16V capacitor connected to it as well
Errata 1:09:17 - PEX is the 0.9V-1.0V supply rail, we'll talk about it in detail a little later
Errata 1:23:58 - On modern GPUs the BIOS is often powered from 1.8V, but on lot's of GPU it is 3.3V and on vintage ones it could be 5V
Errata 1:35:18 - This coil could also possibly be a filter on the PCIe 12V supply coming in
Errata 1:37:13 - I should say 'sometimes on either end'. It depends on the type of regulator, the input or output voltage could be on the tab
Errata 1:38:15 - IC U9 could be the 1.8V supply
Errata 1:23:58 - On modern GPUs the BIOS is often powered from 1.8V, but on lot's of GPU it is 3.3V and on vintage ones it could be 5V
Errata 1:35:18 - This coil could also possibly be a filter on the PCIe 12V supply coming in
Errata 1:37:13 - I should say 'sometimes on either end'. It depends on the type of regulator, the input or output voltage could be on the tab
Errata 1:38:15 - IC U9 could be the 1.8V supply
Errata 1:45:36 - Or the memory VRM is faulty
Errata 1:53:34 - Yeah I think I measured both ends of the same coil, instead of checking both coils
Errata 1:55:20 - I meant to say I forced to to produce an Enable signal
Errata 2:01:08 - This middle pin is probably the reference pin actually, the input voltage will probably be the left hand pin
Errata 2:01:22 - A vintage board like this may not need PEX as the main Vcore voltage is possibly high enough to handle the interface with the PCIe directly?
Associated videos
How to trace a Short Circuit on a GPU VRM
https://www.youtube.com/watch?v=5cG2aJwNoAw
Short Circuit tracing techniques
https://www.youtube.com/watch?v=kGM-Zmrr6tc (part 1)
https://www.youtube.com/watch?v=NUgO7v4cbKs (part 2)
RX460 repair video
https://www.youtube.com/watch?v=vDXSeeY1wDQ
R9-380 repair video
https://www.youtube.com/watch?v=ncsZsPdXnl8
R9-390 repair videos
https://www.youtube.com/watch?v=DvPjTfO3CG0 (part 1)
https://www.youtube.com/watch?v=5ILM2kvm3Vk (part 2)
RX6800 repair video
https://www.youtube.com/watch?v=ooefNfC8Lxg
Видео The GPU REPAIR GUIDE. How to fix GPU /Graphics card not detected. AMD Radeon or Nvidia канала Learn Electronics Repair
THE GPU REPAIR GUIDE - Divided into chapters, English Language
0:00:00 CHAPTER 1 - INTRO
0:01:56 CHAPTER 2 - ESSENTIAL TEST EQUIPMENT AND TOOL (PLUS SOME NICE TO HAVE)
0:18:38 CHAPTER 3 - THE LINE-UP OF SUSPECT GPUs
0:22:54 CHAPTER 4- VISUAL INSPECTION
0:31:55 CHAPTER 5 - RESISTANCE MEASUREMENTS
1:10:09 CHAPTER 6 - VOLTAGE MEASUREMENTS (THEORY ** IMPORTANT)
1:39:28 CHAPTER 7 - VOLTAGE MEASUREMENTS (PRACTICAL)
2:02:49 CHAPTER 8 - THE LIGHTS ARE ON BUT NO-ONE'S HOME
It takes a lot of time and effort to make Youtube videos. If you enjoy my videos or they helped you with your own repairs please consider subscribing to my channel or click LIKE
If you would like to help support this channel you could consider sending a donation or subscribing to my patreon page. All monies received will go towards buying more items to repair and make interesting videos, or to improve my video recording equipment and will enable me to spend more time making better videos
You can send donations via this link
https://www.paypal.com/paypalme/youtubeLER
You can subscribe via this link
https://www.patreon.com/learnelectronicsrepair
Errata 0:40:39 - this pin is connected to ground on the ATX PSU but it is not connected to ground on the GPU - it is a sense pin to detect if an 8 way plug is inserted
Errata 0:43:25 - 12V not 5V
Errata 0:48:44 - Yes I know, I am trying to probe the coil in the wrong place!
Errata 0:52:25 - We also need to test shorts to the coils from the 12V on the PCIe connector
Errata 0:56:20 - and this is why you need to check ALL the phases of the VRM for shorts to ground. It could be possible to have a short on just this phase.
Errata 0:59:45 - The memory controller (which reads short) is part of the GPU
Errata 1:04:06 - it is also common to find a coil in this area which is actually a filter for the 12V PCIe supply, and not a buck regulator coil. In that case it will connect to the 12V PCIe and likely (to give you a clue) to have a 16V capacitor connected to it as well
Errata 1:09:17 - PEX is the 0.9V-1.0V supply rail, we'll talk about it in detail a little later
Errata 1:23:58 - On modern GPUs the BIOS is often powered from 1.8V, but on lot's of GPU it is 3.3V and on vintage ones it could be 5V
Errata 1:35:18 - This coil could also possibly be a filter on the PCIe 12V supply coming in
Errata 1:37:13 - I should say 'sometimes on either end'. It depends on the type of regulator, the input or output voltage could be on the tab
Errata 1:38:15 - IC U9 could be the 1.8V supply
Errata 1:23:58 - On modern GPUs the BIOS is often powered from 1.8V, but on lot's of GPU it is 3.3V and on vintage ones it could be 5V
Errata 1:35:18 - This coil could also possibly be a filter on the PCIe 12V supply coming in
Errata 1:37:13 - I should say 'sometimes on either end'. It depends on the type of regulator, the input or output voltage could be on the tab
Errata 1:38:15 - IC U9 could be the 1.8V supply
Errata 1:45:36 - Or the memory VRM is faulty
Errata 1:53:34 - Yeah I think I measured both ends of the same coil, instead of checking both coils
Errata 1:55:20 - I meant to say I forced to to produce an Enable signal
Errata 2:01:08 - This middle pin is probably the reference pin actually, the input voltage will probably be the left hand pin
Errata 2:01:22 - A vintage board like this may not need PEX as the main Vcore voltage is possibly high enough to handle the interface with the PCIe directly?
Associated videos
How to trace a Short Circuit on a GPU VRM
https://www.youtube.com/watch?v=5cG2aJwNoAw
Short Circuit tracing techniques
https://www.youtube.com/watch?v=kGM-Zmrr6tc (part 1)
https://www.youtube.com/watch?v=NUgO7v4cbKs (part 2)
RX460 repair video
https://www.youtube.com/watch?v=vDXSeeY1wDQ
R9-380 repair video
https://www.youtube.com/watch?v=ncsZsPdXnl8
R9-390 repair videos
https://www.youtube.com/watch?v=DvPjTfO3CG0 (part 1)
https://www.youtube.com/watch?v=5ILM2kvm3Vk (part 2)
RX6800 repair video
https://www.youtube.com/watch?v=ooefNfC8Lxg
Видео The GPU REPAIR GUIDE. How to fix GPU /Graphics card not detected. AMD Radeon or Nvidia канала Learn Electronics Repair
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