I'm getting 1.8v missing on that card. I ckecked GS7103 linear regulator it has vdd and vin but missing the signal enable. I followed the signal should come from a transistor MMBT3904 S1AH and replaced but still no enable volt. replaced the Ic, same result. I measured resistance from pin En to ground, it's 0.7 k and I believe it's supposed to be 10k, I checked all resistors and capacitors in range to find a faulty one but didn't find. Anybody can help?

What is the resistance on 1.8V itself?

I think it's normal. it's 3.9 k from 1.8v pin and ground. any idea?

open schematic or boardview and find enable

I don't have schematic for that card but enable comes from the dual transistor and I changed it with no results

There is schematic for RX-590 and looks the same as you describe on page 21 here:
Gigabyte GV-RX590 GME-8GD Rev: 1.0 Схема
viewtopic.php?f=48&t=2118
Page has description (19) POWER MANAGEMENT
The same regulator and the same NPN transistor

I tried something now, I should share with you. I put external power 3.3v to pin EN from a bench power supply and I tried the card on the motherboard and measured volts, I'm having now the 3.3v at pin EN and accordingly I got 1.8v at pin 7 finally. I measured volts after, I'm getting PEX volt 0.9v and I'm still missing vcore, vram and v ram controller. Any idea? I'm so exited

amkwca
bardview in privat message. it's from msi but similar ))
take for us foto your card from bottom side near U300 and Q210 Q1010

This schematic is probably good. You have to follow these signals backwards. This 1.8V_EN is formed by at least 3 other circuits built on NPN discrete transistors. You have to follow them all.