Repair Synology DS118 - fsbl fail - RAM already changed

[DriversScrew]

I've got a DS118 (Board Model name: HDR11L1) stuck at the very first stage of boot with console output:

C1:80000000
C2
?
C3h
hwsetting size: 000006DC
C4
f
5-5verify fsbl fail
0000003BC7
C1:80000000
C2
?uu3-1

I found this similar issue on the web and changed both RAM BGAs on my board but without any change.
I successfully tested the synology RAM swapped to a standard SODIMM module.
The cpu and mem voltages seem to be generated by a 32-qfn marked W27N 2227. Is there a real name/datasheet for it?
Any help for fault finding is gratefully accepted...

[stj]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

fsbl??
bootloader?
try reflashing the boot chip

[DriversScrew]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

Shouldn't there then be an error like

SF: Detected MX25U6435F with page size 256 Bytes, erase size 64 KiB, total 8 MiB

*** Warning - bad CRC, using default environment

...

SF: Detected MX25U6435F with page size 256 Bytes, erase size 64 KiB, total 8 MiB

SF: 3014656 bytes @ 0x90000 Read: OK

SF: 4587520 bytes @ 0x370000 Read: OK

## Booting kernel from Legacy Image at 08000000 ...

  Image Name:  Linux-3.10.102

  Image Type:  ARM Linux Kernel Image (uncompressed)

  Data Size:  2410000 Bytes = 2.3 MiB

  Load Address: 00008000

  Entry Point: 00008000

  Verifying Checksum ... Bad Data CRC

if it is flash related?
As far as I understand, my system halts already before this.

[stj]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

there are several loaders that load each other.
the cpu has one that loads the serial flash into ram and runs it,
then the one from the serial flash loads the actual o.s. - if it's linux then it may load another bootloader such as GRUB.

[DriversScrew]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

In my case only RTD1296 cpu commands are available. The console is connected via USB-TTL converter to the board.
So the fault must be in a very early stage. fsbl = "first stage boot loader"???

Edit: I managed to read the flash contents with a programmer. How to check if flash content/bin is valid?

[CapLeaker]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

first look if the flash itself is getting bad... copy the content of the flash then FF it.

[DriversScrew]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

No problem with erasing, flashing and verifying the content.
The flash chip itself (MX25L6433F) seems to be fine.

I wonder how I could measure the voltages of the RAM chips, if all are stable?
There are two unpopulated RAM places in DS118. Maybe I can check with an oscilloscope there?

I found the datasheet for RAM, but not for the "W27N 2227" device...

[CapLeaker]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

Look at the data lines on the flash chip? If they are o.k. then the only option you have left is to program a known working file on there. Sure... check the voltage rails for AC on the caps.

[edunotebook]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

Hello, I am needing the bios bin file, since mine is corrupted and does not start

[DriversScrew]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

As far as I know it isn't possible to simply change the flash bin file. You have to adjust serial and checksum, maybe other parameters, too?

[DriversScrew]

Re: Repair Synology DS118 - fsbl fail - RAM already changed

Changed the flash chip, copied the content of original flash over before, but without any change.

[validan92]

Does anyone have by chance a bios for this model ? mine got messed up , and its stuck at blue light .