If the image posted by this supplier of a board for an [https://www.amazon.com.au/MMOBIEL-Replacement-Samsung-Galaxy-A52s/dp/B09JZWCLLX|SM-A528B/DS] is correct then it doesn't show either K1 or K2 on it as seen on other [https://www.ebay.com.au/itm/295698780802|boards] (example only) but I think that one way to distinguish the difference can be seen by the code in the top right corner of the board i.e. A52-072 for SM-528B/DS vs A52s-03 for SM-A528 USA which is shown on both K1 and K2 versions).
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If the image posted by this supplier of a board for an [link|https://www.amazon.com.au/MMOBIEL-Replacement-Samsung-Galaxy-A52s/dp/B09JZWCLLX|SM-A528B/DS] is correct then it doesn't show either K1 or K2 on it as seen on other [link|https://www.ebay.com.au/itm/295698780802|boards] (example only) but I think that one way to distinguish the difference can be seen by the code in the top right corner of the board i.e. A52-072 for SM-528B/DS vs A52s-03 for SM-A528 USA which is shown on both K1 and K2 versions.
Maybe you need to look for a board with A52-072 given that neither the K1 or the K2 versions worked.
The [document|32748|troubleshooting guide] for the A528B series doesn't differentiate between different USB charge port boards but the flowcharts do mention to check the antennas, a lot of which are located on the USB board (see p.32→p.44)
Hi @alexd16324
Here's some info that may or may not be useful.
If the image posted by this supplier of a board for an [https://www.amazon.com.au/MMOBIEL-Replacement-Samsung-Galaxy-A52s/dp/B09JZWCLLX|SM-A528B/DS] is correct then it doesn't show either K1 or K2 on it as seen on other [https://www.ebay.com.au/itm/295698780802|boards] (example only) but I think that one way to distinguish the difference can be seen by the code in the top right corner of the board i.e. A52-072 for SM-528B/DS vs A52s-03 for SM-A528 USA which is shown on both K1 and K2 versions).
Maybe you need to look for a board with A52-072 given that neither the K1 or the K2 versions worked.
The [document|32748|troubleshooting guide] for the A528B series doesn't differentiate between different USB charge port boards but the flowcharts do mention to check the antennas, a lot of which are located on the USB board (see p.32→p.44)