SMIQ03 Fatal Error-CPU.Var Invalid

[Cristian2020]

Hi,

In the process of changing the display glass of my smiq03 (That became to green to see something) with some plastic i decide to copy the content of the boot EPROM from the controller module .I said that is a good opportunity to make-it available to the community and also take a look of a way to enable some options (BER test was one of them). Unfortunately  because of the mixing of activities i end up  starting  the instrument without the EPROM fully inserted  in the PLCC socket.Then the instrument boot up with this error. Fully inserting the EPROM in the socket did not make the instrument boot again.Additional investigation using the service manual reveal that there is a hardware configuration for the CPU module programed with some resistor connected at D4 port IC.Hooking up the Logic analyzer reveals that no read is done to this IC up to the error take over.Reading the CS_REG5 line from D510 using the LA shows that the address lines in order to assert CS5 never gets asserted,so it means that the software gets stuck in the boot process before reading this configuration.I do not have other leads to follow (other then suspecting that the CMOS got corrupted in the process somehow ) or there is an error in the hardware address/data decoding that make the software read something else (but on the other side the LCD gets initialize properly ). Also trying to load a new software in flash  by the R&S utility for SMIQ does not work neither.
I will be very grateful for any suggestion and if anybody has the content of the Eprom copied so i can transfer to some flash equivalent so i can test if it will change the behavior it will be excellent.As a side note the controller has the additional RAM module board populated.I attached the screen capture with the error and also a picture with the sticker from CPU module to identify the Major/Minor Version.
Regards

[KeBeNe]

Hi,

it's a bit older, but could you read the data from the EEprom?
If so, did you try to use a newly written one?

I have some parts here and could do some comparative measurements if that helps.

[Swake]

Assuming you somewhat dismantled the device to get to the EPROM. Have you verified that everything is plugged back in correctly and makes good contact. You might want to redo it: take it apart again and rebuild. Clean all contacts. It is worth the try.

You write the EPROM was not fully inserted. Could it be that it somehow made some shorts or connected lines that should not have been connected? Is it well inserted now? No bend pins or the like in the socket? I remember those PLCC sockets having their own mood sometimes...

As it seems the boot process is not successful, on a 'normal' computer I would suspect a RAM issue and swap that. Is that at all possible on this device? Maybe try removing the additional RAM board and anything else that was optional.