15204 is a device or driver result. Microsoft’s system-code table describes this value as: “The Monitor Configuration API only works with monitors that support the MCCS 1.0 specification, MCCS 2.0 specification or the MCCS 2.0 Revision 1 specification.”
Code reference and safe checks
Read the exact screen and operation before selecting a repair. This page does not run commands or collect files, keys or logs.
What this value means
Microsoft’s system-code table describes this value as: “The Monitor Configuration API only works with monitors that support the MCCS 1.0 specification, MCCS 2.0 specification or the MCCS 2.0 Revision 1 specification.”
ERROR_MCA_UNSUPPORTED_MCCS_VERSION is a Win32 system result, usually returned to an application or API caller. It is not a Windows blue-screen code or a diagnosis of the whole PC.
| Code | 15204 |
|---|---|
| Hex form | 0x3B64 |
| Symbol | ERROR_MCA_UNSUPPORTED_MCCS_VERSION |
| Windows family | Win32 system codes |
| Source level | Microsoft code and symbol entry |
Safe next steps
- For 15204 (ERROR_MCA_UNSUPPORTED_MCCS_VERSION), identify the device and exact model that produced the code; record recent driver, firmware, or hardware changes.
- Check Device Manager and the manufacturer’s official support page. A driver name or code is a lead, not proof the device is damaged.
- Stop if the device overheats, disconnects repeatedly, or needed files are at risk.
After one step, repeat the original operation and record whether this same code returns. A different code needs a fresh interpretation.
What this code cannot prove
The source establishes the identifier and reference meaning. It does not establish the cause on your specific PC.
If the result differs from the documented message or a repair could remove data, stop and use the official source or vendor support.
Official reference and verification
Source type: Microsoft code and symbol entry. Checked against the source set on Nov 2, 2026.
The reference gives the meaning of this identifier. It does not inspect your PC or guarantee that one repair will work.