View source for XFX RX 580 Not turning on, missing Vcore, low 5V Repair

{{stub}}
{{Repair Guide
|Device=
|Affects parts=
|Needs equipment=
|Type=
|Difficulty=
}}
==Problem description==
Fixing a rare issue with the XFX RX 580 where Vcore/VDDCI are missing but EN and VCC are present. This particular issue is concerned with low 5V voltage.
[[File:LM1117 on 580 xfx.jpg|thumb|5V LDO (LM1117-AD) on XFX RX 580 (Figure 1)]]

==Symptoms==

*Missing VDDCI/Vcore
*Core not heating up/detected
*Less than 4.7V on 5V rail

==Solution==
===Diagnostic Steps===

Measure the voltage present at the [[5V Rail on Polaris GPUs Explained|5V Rail]], voltage less than 4.75V will let other rails rise but not [[VCore Rail on Polaris GPUs Explained|VCore Rail]], as the [https://media.digikey.com/pdf/Data%20Sheets/ON%20Semiconductor%20PDFs/NCP81022.pdf NCP81022] requires at least 4.75V on its VCC pin. If you measure 5V at the 5V rail, and EN voltage is around 3V and still no output on Vcore, you have another issue.
===Repair Steps===
If you're measuring less than 4.75V on 5V rail, simply replace the 5V controller (Figure 1) on this card. It is the [https://eu.mouser.com/c/?q=lm1117 LM1117] LDO.