As a comparison, I did
this with an AX6BC Pro, an ASUS S370-133 slocket ($20) and a P3 850. I set the slocket to auto/P3 and the system detected the voltage properly and ran with out a hitch from the start. The ASUS slocket has 2 groups of jumpers - one jumper for P3 or Celeron and another set of jumpers for auto or manual voltage. The BIOS detected the CPU as an 800, but actually ran it at the correct 850, and later at 1000.
Checking
this Intel Celeron S-spec chart, I assume you have the cC0 stepping SL4NX (retail) or SL4PB (OEM) that run at 1.70 volts, and not the cB0 version which takes only 1.60. The 300A uses 2.00. I see that the
latest BIOS for the AX6BC is R2.55 dated 8/18/2000.
If the board has the latest BIOS and still runs the 300A OK, then the problem must be either a bad 600 CPU, a bad slocket or bad settings on the slocket, I believe.
So be sure the BIOS flashing went OK and that the board runs the 300A. Maybe then try another slocket, and be sure to set it to auto, Celeron etc. Maybe check the 600 in another PC, if that's possible.
Here's a troubleshooting guide I put together for another forum:
FYI: Trouble-shooting basic problems at boot-up:
Be sure that the components you are trying to install on your motherboard, especially the CPU and RAM but other parts as well, are good quality brand name components and are compatible with your precise motherboard model, model ver-sion and BIOS version. You may determine compatibility from your motherboard manual or, even more reliably, from the manufacturer?s website, where you should find a very informative set of pages related to your particular model of board. If you don?t have the manual for your board you should be able to download it from the board manufacturer?s website. This is also where you can download BIOS upgrades for your motherboard, if needed.
As far as trouble-shooting boot-up problems go, first look through your motherboard manual to review its installation and troubleshooting procedures. Or check the procedures at this site [L]http://www.giga-byte.com/gigabyte-web/faq_gt.htm[/L]. Also note how to ?clear or reset the CMOS,? how to enter your BIOS setup utility program when the PC is started, and how to load default BIOS values in the setup utility. General information on BIOS settings is available at [L]http://www.ping.be/bios/[/L]. You should also have handy a bootable floppy disk and operating system ?rescue? disk. For help in setting up or configuring a hard drive alone, see the reference in the last point below. Also, for Windows 98 start-up problems, see: [L]
http://support.microsoft.com/support/kb/articles/Q188/8/67.ASP?LN=EN-US&SD=gn&FR=0 [/L]
Suggested boot-up trouble-shooting procedures:
1. Turn off the PC and unplug it. Then remove all the cards, cables, peripherals, etc., except for the CPU, CPU fan and RAM. This means disconnect everything attached to the VGA, PCI, ISA, AMR, CNR, IDE, FDD, COM1, COM2, LPT1, PS/2, and USB connecters, including expansion cards, drives, mouse, keyboard, printer, and so forth. Remember when working with any PC components, in or outside the case, to take measures to reduce the chance of electrostatic discharge damaging them. Wear an anti-static wrist strap if possible, and keep components in anti-static bags until needed. Check that the power supply voltage is set properly to match the line current, and, if there is a local power switch on the power supply, that it is turned on (this is pretty rare).
2. With respect to the motherboard itself, be sure there are no unused metal standoffs under it to short it out. On the motherboard, be sure your CPU, CPU heatsink and fan, and RAM are seated properly and are the correct type for your motherboard. Connect the CPU?s fan to the motherboard. Check that any jumpers on the board are set properly for your type CPU & RAM. Be sure that all the wires leading from the front panel switches are properly connected to the correct pins on the motherboard - this can be quite tricky sometimes.
3. Clear the CMOS and note that the motherboard battery is properly seated or reseated.
4. Reinstall the video card and connect the monitor and keyboard. Plug in the monitor. Use the PS/2 port for the keyboard at this point. Skip the mouse for now. Again be sure everything is seated properly, and be sure that if you use a power strip or UPS of some kind that it is plugged in and operational.
5. If during the remaining procedures you hear beeps or half beeps at startup, count them carefully. Check your manual or the board maker?s website for the meaning of these error code beeps, or search for ?beep codes? here: [L]http://www.pcguide.com/search-c.html[/L]. That site, the PC Guide, also contains exhaustive trou-bleshooting procedures.
6. Cross your fingers, plug in the PC and turn it on. The PC?s LED?s should light and the CPU fan should spin. If not then either the power supply or the motherboard are kaput. Most likely it?s the motherboard. Have the power supply checked, or install a temporary replacement power supply, to confirm that the motherboard is at fault. Replace the defective item and continue.
7. Once you get to this point successfully, note if your monitor has a display. If not then either the video card or the monitor is at fault. Temporarily replace the monitor or video card to see which is at fault. Replace the de-fective item.
8. Next simultaneously press CTRL + ALT + DEL to reboot. If the system does not reboot then probably your keyboard is shot and should be replaced. Unfortunately, in most cases the keyboard, an inexpensive item, will not be the problem.
9. As the system begins to reboot press the appropriate key(s) to enter the BIOS setup utility program. In the BIOS setup find the menu item for ?Load Setup Defaults,? or similarly titled item, and select it in order to set the BIOS to conservative default values.
10. At this point your system should be operational at a most basic level. Turn off the PC. Then reconnect your IDE cable and master HDD and restart the PC. Be sure the jumpers on the drive are set correctly. If the sys-tem does not reboot properly then the problem is with either the IDE cable, the drive or the power cable to the drive. Temporarily replace the cable to determine whether the problem is the cable or the HDD or power cable. Check the power cable with a multimeter, or with another properly working device like an auxiliary fan, or just listen for the spin-up of the drive. Replace or fix the faulty component. At this point you may want to install a floppy drive and see that the PC will boot from a bootable floppy disk.
11. With a system that will boot correctly with a HDD and/or FDD connected you may then proceed to configure your hard drive and install your operating system if necessary, and to reconnect and install the other compo-nents of your system. Usually your hard drives manufacturer will have utility programs available on floppy disks or for download that simplify the setup of new drives or the transferring of partitions, etc. For help in replacing or configuring a HDD see: [L]http://www.zdnet.com/pcmag/stories/solutions/0,8224,2586419,00.html [/L].
Edit:
Maybe the system is confused by the newer cC0 stepping.
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