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#1
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gigabyte ga-7vaxp
I have a gigabyte ga-7vaxp board and an ati rage pro 128 video card
with a sempron 2600+ cpu.When I turn it on the fans start to turn and the power led on the board lights up.I've tried a different power supply and checked the power switch.I have no drives attached now but did the same thing with them hooked up.Open for suggestions. |
#2
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gigabyte ga-7vaxp
Are you getting the POST (Power On Self Test) bios beep when you power
the computer... this you will get even with the CD/DVD and hard drive disconnected. I will give a example, my mobo would POST boot ok but it would not load the hard drive... kept asking for the disc, disc failure I thought, still same when I borrowed another hard drive. As a last resort I re-booted the bios by removing the battery, lo and behold that cured the fault but everything in the bios was set correctly including the time. While the battery was out I checked it with a digital testmeter (don't use the old pointer types - flatten the battery quicker you can shout "boo"), it was down to 2.5 volts but it still worked ok, so when the shops opened the next day I got a battery to be sure. Was it the battery, a 'glitch' (a voltage spike) on the mains or a bug I dunno, but been alright ever since. Do note removing the bios will set the bios to it's default settings, so if you take this route try and get into bios and try to take notes of the settings.. Another cause maybe the graphic card, try re-inserting sometimes help, could even be the power supply, these are the first thing I would think about. Just for the record. One thing I did discover with mine was a couple of bad caps... as far as I am aware this only applied to version 1 of this board, there are two situated near the yellow socket 1200uF 6.3V (I used 1200uF 16V), the tops was bulged, although the computer worked OK I decided to change them to be on the safe side..... always use hi- temperature types 105º C types, 125º C types are even better but are harder to get they must be HF types with low ESR (Effective Series Resistance), the gunge that they sometimes leak is very corrosive and will eat away the copper circuit tracks. [b:98a3bf2707]Never use standard types here.[/b:98a3bf2707] As I understand these where changed in later versions, this only applies to these Green Taiwan made caps in Version 1. Just for an idea see-: http://www.howtofixcomputers.com/bb/ftopic112758.html following the links will show you what to look for. Davy |
#3
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gigabyte ga-7vaxp
It doesn't beep or even start to post so I can't enter bios.I removed
the battery and tried it,no difference.Haven't changed it or looked at the cap. appreciate any other ideas. thanks. |
#4
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gigabyte ga-7vaxp
May be check the bios battery, preferably by replacement, can you not
drop another power supply in just to confirm that this isn't the fault. The first goal is to get the bios to boot (you will get POST boot with all the disc drives dis-connected hdd inc.), so look towards the bios battery, power supply or graphic card, if possible check by replacment all we are interested in is getting the mobo to boot. Does the CPU fan feel's free and easy to turn.... if it's stiff it could easily have damage the cpu by causing it to overheat un-knowingly, but CPU's normally shut down with excess temperature's. Also check the Northbridge fan, thats the one mounted flat on the gold coloured heatsink on the mobo, this can become stiff, normally people removed this fan and mount a larger passive heatsink on - just that I was wondering if the Northbridge chip could have become damaged. On a good mobo with no RAM installed you should get a series of beeps (error code). Note to reboot the bios, the battery needs to be removed for about 3~4 minutes, removing and re-inserting it 'may' not cause a bios reset. Davy |
#5
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gigabyte ga-7vaxp
I tried 2 different power supplies and changed the battery.I also
checked all the fans by putting them in pc's that are working fine and had no problems.I took out all the ram and didn't get any beeps,even changed the speaker and no diference.I tried an nvidia video card but don't think it or my ati card are 8x only 2xor 4x.Does it matter?THANKS!! |
#6
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gigabyte ga-7vaxp
hardtimes wrote:
I tried 2 different power supplies and changed the battery.I also checked all the fans by putting them in pc's that are working fine and had no problems.I took out all the ram and didn't get any beeps,even changed the speaker and no diference.I tried an nvidia video card but don't think it or my ati card are 8x only 2xor 4x.Does it matter?THANKS!! CPU is toast??? |
#7
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gigabyte ga-7vaxp
It wasn't the cpu.I got an ep-8krai pro epox m/b that supports the
sempron cpu and everything works.I wondered if the bios on the gigabyte m/b needed to be upgraded before it would support the sempron cause I did find an upgrade at gigabyte for the sempron cpu.Would like to know for sure.Thanks for all the help. |
#8
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gigabyte ga-7vaxp
Sorry can't say, only ever used AMD's. Have a peep here, selecting the
relevant mobo series -: http://www.gigabyte.com.tw/Support/M...yword=GA-7VAXP Davy |
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