diff --git a/pyasic/config/__init__.py b/pyasic/config/__init__.py
index 12131750..c1681fc8 100644
--- a/pyasic/config/__init__.py
+++ b/pyasic/config/__init__.py
@@ -326,6 +326,8 @@ class MinerConfig:
                 if data[key]:
                     if data[key] == 1:
                         self.autotuning_wattage = 0
+                    if data[key] == 2:
+                        self.autotuning_wattage = 1200
             elif key == "fan_control":
                 for _key in data[key].keys():
                     if _key == "min_fans":
@@ -462,6 +464,9 @@ class MinerConfig:
         if self.autotuning_wattage == 0:
             cfg["miner-mode"] = 1  # Sleep Mode
 
+        if self.autotuning_wattage < 1800:
+            cfg["miner-mode"] = 2  # LPM?
+
         if not self.temp_mode == "auto":
             cfg["bitmain-fan-ctrl"] = True
 
diff --git a/pyasic/errors/__init__.py b/pyasic/errors/__init__.py
index 206f80c2..590d92f7 100644
--- a/pyasic/errors/__init__.py
+++ b/pyasic/errors/__init__.py
@@ -24,6 +24,8 @@ class APIError(Exception):
 
     def __str__(self):
         if self.message:
+            if self.message == "can't access write cmd":
+                return f"{self.message}, please make sure your miner has been unlocked."
             return f"{self.message}"
         else:
             return "Incorrect API parameters."
diff --git a/pyasic/miners/_backends/X19.py b/pyasic/miners/_backends/X19.py
index 4f85ee68..7b25d52d 100644
--- a/pyasic/miners/_backends/X19.py
+++ b/pyasic/miners/_backends/X19.py
@@ -107,7 +107,7 @@ class X19(BMMiner):
 
     async def resume_mining(self) -> bool:
         cfg = await self.get_config()
-        cfg.autotuning_wattage = 1
+        cfg.autotuning_wattage = 3600
         await self.send_config(cfg)
         return True