I have the same problems this is my summary of the problem and what I have done to solve it - looking for help too on fixing it ...
Topic: MB GA-Z77X-UD5H BIOS Start Debug LED Codes Codes 15 then 53 followed by restart
I am currently building my first computer using the following components:
My PC build consists of:
- Corsair 800W PSU Gaming Series
- Antec P280 Case (size, air flow, sound proofing, wiring)
- Gigabyte Motherboard - GA-Z77X-UD5H
- CPU Processor: Intel Core i7-3770k
- Corsair Vengeance Ram - 8 GB X 4 (32 GB Total and maximum for this motherboard) (CMZ32GX3M4X1600C10)
- SanDisk Solid State Drive (main boot) - 240 GB
On start up I have the following Debug LED Codes:
Code 15 - "Pre-memory CPU North-Bridge initialization is started. (Which I assume means the Intel Chip is initiated)"
53 (50-55) - "Memory Initialization errors occurs". (Which I am not sure which memory this refers too)
I have the same code sequence without RAM.
I have the same code sequence with one 8GB RAM of the Vengeance Ram placed in all four slots and tested in turn.
I have the same code sequence with one 4GB RAM of Integral DDR3 1333 Mhz DIMM Ram in all four slots and tested in turn.
What memory is the BIOS trying to initialize would this be RAM or hard disk drive.
Aside from return to the supplier and ask for more recent version of the Gigabyte Motherboard as I understand that there is a REV:1.1 available.
The Revision Number of mine is: REV: 1.0 of the GA-Z77X-UD5H motherboard.
I have also tried Clear CMOS and taken the battery out to also reset the CMOS.
Any other suggestions would be really appreciated.