Hi,\n\nThis is now the second time I've posted in regards to this very same\nproblem. I started having checksum errors with my new (month old) NF7-S ver2\nmainboard. I updated to ver.17. I had posted earlier asking if this could be a\nMB battery problem. I had a reply stating it could quite be the PS.. having a\nnew case in mind I went out and purchased a new Antec Case with 350W PS. It\nseemed to handle the problem.. but within a week now the problem has returned\nsince I did the CMOS clear method 3 from Abit and per other posts here on this\nnewsgroup.I had another checksum error yesterday and was quite pissed at this.\nI went through what had worked previously with the method 3 CMOS clear..\n(remove power cord, remove ATX power connector to MB, clear CMOS via jumper and\nremove mb battery.. let sit for a few minutes and put it back together) I did\nthat again.. worked before but this time no go.. no post.I even left it as is\n(no mb battery etc.) overnight. fans spin and as far as I can tell it goes up\nto hard drive seek but nothing beyond that. I have not changed anything and\nhave been very happy with my setup thus far.. system specs below. I have not\no'clocked this system. I have owned many ABIT boards before this one and have\nnever ever had this type of problem. I point the finger of problem to Nvidia's\nchipsets as I've never had ANY situations with Intel or VIA chipsets before.\n\nNF7-S ver 2. bios 17\n2X 256mb Mushkin PC-3200 cas 2 mem\nWestern Digi 60gb\nAthlon XP 2800 B core\nLeadtek FX5600 vid card w/256mb vid mem\nAudigy 2 sound card\nLynksys ethernet card.. ( i know it has onboard lan.. but I've used this one\nwith satisfied results ... will be using mb lan for backup)\n\nAny help on this would be appreciated...\n\nTom J.