Hi, I used Sempron 2800+ and recently I changed (only) the CPU with Athlon 64 3200+. My Setup: Motherboard: PC Partner RS482MK7-A70S Chipset: ATI RS482 CPU: Athlon64 3200+, Socket754 RAM: Single stick V-Gen, 1GB PC-3200 DDRAM, double sided with 16 chips Video: Onboard ATI Radeon Express 200 Sound: Onboard Power: 450 Watt But when I startup the system, the power was OK, fan was spinning, but I only get a blank screen (no signal), no beep, not even any splash and BIOS screen. Both LEDs (power n HDD) are on, no blinking. I tried to update my BIOS. I also double checked that the Athlon64 3200+ is supported, and apparently it is. I tried to unplug all CD, Hard Drive, and even CPU fan, no result. Suspecting the power supply, I also tried to plug the monitor-power directly to my house power socket. But still I got no result. So now, basically only bare devices are connected to my PC. I tested the CPU on other PC (MSI mobo), and it works fine. I tried to use the 256MB DDRRAM from that MSI PC to my PC, and still, it doesn't work. If I switched the CPU back to Sempron, it works fine. So I guess the culprit must be the combination of the mobo and Athlon64. I wonder what else I need to do to change my CPU from Sempron32 to Athlon64. Do I need to set some jumper? I can't find it in the manual and troubleshooting guide in manufacturer website. Googling doesn't give me any lead as well. Can somebody help me please? Thank you in advance for any help... Cheers Hendry
Reset the Cmos (there is 2 pins that should be near the CMOS battery on the board, either take the jumper off if there is one on it allready and then turn the computer on for 5 seconds, then turn it off and take the jumper off, you may find that there is no jumper on it and you need to place one on and turn computer on for 5 seconds then turn it off and remove it. So you went to the mobo manufacturers website and downloaded the latest bios for it too and placed it onto a floppy disk?
Hi Willz, Yap, I did flash the latest BIOS from PC Partner website. There were an option there to clear the CMOS, and I chose it, but it doesn't solve anything. By the way, as you suggested, I reset the CMOS using the jumper. It was moving a jumper from 1-2 to 2-3. IT WORKS, thanks... My pc seems to boot normally, but it displays something like: "CMOS checksum fail - load default". I pressed F1 to continue, and it continues booting normally. But after I restart the machine, it brings me back to the old same blank screen. So in short, every time I boot up my PC, I have to do the CMOS reset. Otherwise, it gives me the blank screen. I can't reach Windows, but it's normal since it doesnt detect my HD well unless I set my RAID SATA as IDE controller in BIOS Setup (which unfortunately requires restart). I can boot using CD though. I tried to flash the BIOS back to my old backed-up one. But still the same problem: I can't boot unless CMOS is reset. Any help please?
The CMOS Checksum Fail usually is a sympton of a dead battery, you will need to replace that. CMOS setup? you mean you need set all your settings again? if so, i reccommend you just turn the PC on, leave it for 15 mins, then turn it off and see if you have the Checksum error again, its possible you wont as the computer will of charged the battery slightly but you still should buy a new one (there is a code on the battery, type that into a search engine and you should find the right battery )
Sorry... I did typo.. I meant I have to reset CMOS everytime I boot my PC. And to make clear, after getting the CMOS checksum error, I press F1, everything boots well. But if I restart the machine, it goes blank, unless I reset the CMOS again. In fact, I have to do this reset evertime I boot the machine. By the way, I doubt that it's the battery. I was still using my PC an hour ago with Sempron, and it works fine. It can save my BIOS setup (especially SATA config I mentioned). The problem is only when I switch it with Athlon64. But I will try your suggestion to leave the PC on for 15 minutes with this blank screen (do you mean 15 mins with blank screen or a normal screen after resetting CMOS?). And to make sure, I will try switching the CPU back to Sempron and see if it works. I never tried my Sempron since the CMOS reset. If it does work, is there still any chance that the battery is the problem? I'll get back with the result... Thanks a lot...
When i reset the computer on mine using CMOS, i get the checksum too, i think it must drain the battery then. When you reset the CMOS, did you put the jumper back in the correct place? It seems like there must be some Incompatability with the AMD 64 and your motherboard but i see on the website it does support AMD64, i seems like possible a faulty motherboard but then again as you said your sempron works properly, i can only think that its either bad bios, or faulty bad battery, try the sempron in it now you have reset the cmos and see if anything different happens.
I tried the Athlon64 again. When it told CMOS checksum error, if i reset the system without pressing F1, it can reboot well, bring me to the same CMOS checksum error. So, I got blank screen only after I pressed F1 and restart the system. I tried Sempron, I got the same CMOS checksum error. I pressed F1, it booted normally. I tried to restart, it boots perfect without any CMOS checksum error. So, it works fine with Sempron now. I don't know how this could happen...:x: Any advice? Probably there's something in CMOS setup I have to set for Athlon64 that makes it different with those for Sempron? And thanx Willz for the quick response
I am running out of ideas now, it should work :s, the thing is, its proberbly going to be something so easy and simple that will solve the problem Maybe it could be the ram? but everything works perfectly with the sempron, i think its the bios not working correctly with the AMD64 even though it supports it, try an earlier bios.
Alright. I dont know what else to do either. Yes, I tried earlier to reuse my old backed-up bios. But no result. I've mailed PC-Partner, and see what they'll say. Thanx for helping anyway, Willz.
Ok no problem i hope PC-Partner will be able to solve the problem. If they manage to solve it do come back and tell us what the problem was, i am intrested as to why its having these weird problems with the AMD64.
