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Gateway 2000 4SX-25 error codes on start-up

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    I installed the correct memory, confirmed all jumper settings, confirmed CMOS battery is good, etc. and no changes whatsoever


      Doing some digging through Gateway's website via I found this:

      Beep Codes
      Below is the beep code sequence for the Intel I4 Integrated 486 systemboard. During the boot sequence you will receive a series of numbers. They don't indicate a problem, but rather verify certain functions during boot.
      440 Size memory above 64 KB
      370 Keyboard controller initialization
      330 Initialize auxiliary controller
      290 Test memory above 64 KB
      210 Read Keyboard ID
      190 Real time clock test
      135 (The number gets brighter. This is normal) Access to Setup Program
      130 Initialize diskette subsystem
      10 Enable cache
      000 Boot


        It looks like your computer didn't make it to the "10" post code for enable cache. Does your system have cache installed? If so, verify they are seated (press on each one, chip creep may have occurred). Also, verify the cache jumpers are correct:
        Size J11 pins 1 & 2 J11 pins 3 & 4 J11 pins 5 & 6 J11 pins 7 & 8
        64KB Open Open Open Open
        128KB Closed Open Closed Open
        256KB Closed Closed Open Closed


          This is awesome info... I looked on but only found the Gateway CD's which I DL'd years ago. Great info about the codes... I guess human nature is to think that they are error codes and not function verifications. I will definitely check the cache settings this evening... I know that some of the jumper settings were incorrect and needed to be changed but I didn't check the cache

          Did it have any info on the beeps? Once it shows 135, it beeps twice. Then once it shows 130, it beeps once.

          Thank you!
          Last edited by dafivehole; May 18, 2021, 11:56 AM.


            I found nothing about beep codes. I used's feature of viewing web pages from long ago (the wayback machine). That's how I found them. I believe I found these on Gateway's website from either 1996 or 1997. I tried to download a manual but all of the links I cam across were no good.

            I'm not sure how the beeps are ordered (do they mean the upcoming code has an issue, the current code displayed, or the previous code displayed?) If it's for the 190 code then your CMOS battery needs replaced, if for 135 then again perhaps CMOS battery, if 130 then maybe it's indicating it couldn't find a diskette drive attached.


              I give up... I think something is fried on this MB. I'm using known good drives, etc. I verified all jumpers were set correctly, the battery is new, the memory is correct, I reset the BIOS settings to get this far and I get this message:



                You may have a bad hard drive. Have you tried setting CMOS to no hard drive and not hooking one up? Try booting from just a floppy drive. If that works then look at the IDE connector on the motherboard, inspect the cable or try a few different ones, and make sure the hard drive is set for single/master.


                  There is no option in setup for no hard drive or booting from just the floppy. I tried two different hard drives that are known good and neither worked... tried two different known good cables, still nothing... I'm sending the computer back. Thank you to everyone that responded.


                    Did you make sure the IDE cables were in the correct orientation? A lot of older systems don't have keyed IDE connectors and let you flip them any which way around, even allowing you to go off the connector and miss a couple of pins.