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View Full Version : Old But Unused Mobo Won't Boot Up


aqafaq
02-20-2003, 10:30 AM
MOBO: Pentium 1 Eagle Power 586 (dat's wat is stated on de manual cover)

CPU: Intel 233 MHZ with MMX.

Video Card: Cirrus Logic (8MB Ram)

CPU Fan: Thermal Manager powering off directly from the power supply

Ram: There is one SDRAM & 2 EDO ram slots. I tried various combinations of PC 66 to 100 SDRAM by itself or in combination with the EDO.

Power Supply: AT 230 watts


Problem: Firstly I muz state dat de manual is quite hopless, even de space reserved for a diagram of de mobo is blank probably due to misprinting. Fortunately in de chinese section of de manual, there is one though de printing leaves a lot to be desired, but better den nothing I figure. From the CPU itself I figured that the core voltage was 2.8 v and have dat configured accordingly. But because of de inadequacies of de manual, I could not figure out de CPU I/O voltage, but guessed dat to be 3.45V. As for de external bus frequency, I configured dat according to the Ram I used. Last but not least is de CPU/BUS frequency ratio, again some guess work had to be employed.

The mobo received power as evidenced by de whirring of de CPU fan. I tried various combinations of RAMS and other adjustments (including jumper settings) and even swapped monitors (both work well with other CPUs). At best I only got some beeps (probably showed the ram post) and de keyboard lite lit up, but that was about all, When I pressed ctrl-alt-del, it restarted, but same sequence. On some occassions, I didn't even get any response, no beeps no nothing. Oh yes, I also swapped de video cards 3 times.

So guys, pls help. Thanx in advanve.

deddard
02-20-2003, 02:27 PM
First thing I'd do on an old board is to check the CMOS Battery state.
If you have access to a voltmeter, measure the voltage across the CMOS battery whilst the machine is SWITCHED OFF AND UNPLUGGED.
The battery should have it's voltage printed on it - if it doesn't match what you find, then it needs replacing.

Sylvander
02-20-2003, 03:30 PM
Send me a private message giving an e-mail address to send to and asking for My Diagnostic Charts and Boot sequence info in Word document files.

Here’s ONE route through the Diagnostic Charts.

STARTUP
1. Is the PC dead? No.
2. Did POST appear to run? No.
3. Were there any audible beeps? If not POST did not complete so go to NO POST. If there were then:
4. Is the monitor display correct [were there white characters on a black background at least]? If not go to DISPLAY. If there is a display then:
5. Is there an error code? If there is, then check the code and go to the relevant test. If there is not then go to BOOT UP.

NO POST
1. Are the PSU voltages correct? Check them if you can. If they are not you may have a faulty PSU. Assuming they ARE ok then:
2. Disconnect all peripherals and system adaptor cards except the keyboard and video card/monitor.
3. Does the POST now run? If it doesn’t then your system board [or something on it (video card, CPU, memory)] is faulty. If it does run then:
4. Re-connect the floppy disk drive and run advanced diagnostic software from a floppy disk. Get “TuffTest-Lit” from http://www.tufftest.com/free.htm, or better if you can. This is simple and basic.
5. Does the system board pass? If not then it is faulty. If it does pass then:
6. Switch of and re-connect ONE peripheral/adaptor card.
7. Does POST now run? If it doesn’t this last device connected is faulty and should be disconnected. If it does run the device should be tested using the diagnostics and if it fails is faulty and should be disconnected. If it passes it's ok and should be included.
8. Repeat from step 6 until all devices are tested, all faulty are excluded and all working are included, then re-test the system.

DISPLAY
1. Is there a display?
a. None: the screen is dark.
a1. Is the mains lead ok? If it is then the monitor is faulty. If it’s not ok then replace it and re-test the system.
b. There is no display provided by a signal from the PC but the screen is lit up.
b1. Is the signal lead ok? If it is then the video adaptor or system board is faulty.

BOOT UP
1. You have an active display; no error codes; POST appears to run.
2. Does the system boot from the Hard Disk Drive? If not your HDD is possibly faulty so go to the HARD DISK DRIVE chart. If it does then:
3. Can the floppy disk drive be accessed? If not go to the FLOPPY DISK DRIVE chart. If it can then:
4. Does the mouse function correctly?

ETC, ETC, ETC.

Do you see why you really need the charts to cover all the possible routes down which you might need to go to find the culprit?

aqafaq
02-24-2003, 02:08 AM
Hey guyz, thanx for de response, I certainly will rework my options and will keep U posted.:)