Sgx boot error

[PRECISIONLAB]

SGX will not boot

This is used in a classroom setting and not for profit so any assistance is welcomed

Please see image

[feelx77]

I see this post is from April. But it appears to me the original CMOS/BIOS backup battery is probably dead after 15-25 years of use. Most can not be replaced without de-soldering the old school battery chip (long discontinued in the electronics market) or special electronics tech trickery. HOWEVER, you can still use the SGX just like normal with a few steps.

At that prompt you can type: dir than enter or dir/p to pause each screen.

You will see a few .exe applications in the listing. Think its called "loadsgx.exe" you will find.
Type that, hit enter. Your up and running. Only minor issue is the job number when called up may be off by 1 digit with an extra number when pulled. Every time you turn on from scratch all you would do is type "loadsgx.exe" hit enter. Continue as normal. Just figure out the job number when pulling it will be off by 1 digit but was easy for me to figure. Just do not remember specifically. Absolutely no Rx processing errors will be incurred.

All these issues which are minor stem from the fact that without the backup battery working the BIOS settings have been forgotten for the 486 computer boot up process. So memory timing are thrown off making it say that load up error when you first turn it on.

Technically I could send you all the screenshots for the BIOS settings, You could save them and just never turn off the SGX afterward otherwise the settings will be lost again.

SGX will not boot

This is used in a classroom setting and not for profit so any assistance is welcomed

Please see image

[PRECISIONLAB]

Absolutely correct. I did what you mention here to get machine to boot and run. I would appreciate BIOS settings

The issue I am having now is that it takes several attempts to load job. I have to hit enter several times for job recall

Thanks for your help

[feelx77]

[feelx77]

That should be all the entry screenshots. Just put your correct date not mine lol
Should boot up, post like normal and read the serial data port correctly afterward. You will have to re-enter this every time if the BIOS/CMOS battery is dead or leave your SGX always on.

[PRECISIONLAB]

Appreciate this

[feelx77]

If interested.....it is possible to pull the board out of the sgx and solder a 2032 battery mount to the board once you cut into the old CMOS battery sqaure chip. It was hard for me to find but someone did it or you can take a gamble and buy one of the old stock CMOS chips on Ebay.com (sometimes Amazon.com) and send the board to an electronics specialist to swap it out. Problem is there is no guarantee a 20 yr old/new stock chip will work. Below are links to buy a new chip (so they say) and some additional background information about the actual Dallas RealTime Clock/CMOS chip in your SGX.....how to hack it or replace it:

https://www.ebay.com/itm/25553761553...cAAOSwcBRigUp3

That Ebay item number is 255537615536

https://www.classic-computers.org.nz...ttery-chip.htm

Keep An Old Real Time Clock Module Ticking | Hackaday

Reworking Dallas RTC Modules (ardent-tool.com)

You could pull the board and send it along with the new Dallas chip you order to a GES Service Center or request a quote for them to swap the chip out. But in case they do not have one you send the one from Ebay assuming it matches up to your SGX system pull. Personally any local electronics specialist could de-solder and replace the chip for you to try if you supply the correct one.



You should be all set now lol

[PRECISIONLAB]

I was reluctant to attempt cmos battery replacement myself. Plus I didn't want to damage board.

The work around is allowing me to have my students complete midterm and final projects.

Posting pictures of the board as reference for future visitors to this thread

Thanks again for the sound advice

[chevypow]

Buying any and all Briot edgers

[feelx77]

Buying any and all Briot edgers

What did "Buying any and all Briot edgers" have to do with this "SGX boot error" technical thread? Which is a lens surface generator.....
Please do not thread hi-jack just to advertise. Create a separate posting for your equipment buying/selling requests. (in my respectful opinion)



...and to PrecisionLab----> You are very welcome sir!

[MrLtrain]

i just fixed a similar problem with my SGX.. my biggest issue was that Coburn no longer has anyone to make the boards and it seems like they wasn't look for anyone either... per Mr. Expert. He also suggested Optical Works Corp... i had used them before for other OLDER parts but not anything as new as the SGX. However, they had 1 on the shelf ready for install and got me up and going.. my question is:

Are you all having trouble finding parts? thx in advance