Sorry to hear that bud and their tech support sounds like a joke.
My first guess would not have been the mobo at all .
Instead a faulty power supply shorting things out or a inproperly grounded MoBo.
That would have caused the reaccuring issue you explained.
Any way word of advice don`t skimp on a new MOBO and buy a bag of rubber MOBO washers ,for when you put it in.
Below I listed my top three MOBO choices for you.
Hope that helps....

First choice
Abit AMD761 Chipset ATX Motherboard Model KG7-Raid Retail Box 6 PCI Slots, Four 184-pin DIMM sockets support up to 4 GB PC1600/PC2100 DDR SDRAM module , 1 AGP Slot. Support AMD Athlon/Duron 700MHz ~ 1.33GHz or future Socket A Processors based on 200/266 MHz(100MHz/133MHz Double Data Rate). Ultra DMA 100/RAID: High Point HTP370 IDE Controller Fedex Saver Shipped $183.00
http://www.newegg.com/app/ViewProduc...nufactory=1283

Second Choice
Gigabyte GA-7DXR Socket A RETAIL Motherboard with RAID AMD 761 AGPset for AMD Athlon/Duron 200/266 MHz FSB, 1 x AGP Pro Slot, 5 x PCI Slots, 1 x AMR Creative CT-5880 sound chip & AC97 codec Promise ATA100 w/ RAID chip Fedex Saver Shipped $199.00 http://www.newegg.com/app/ViewProduc...nufactory=1314

Last resort choice.
EPOX 8KTA3 Motherboard VIA KT133A CHIPSET, Supports 266 mhz FSB, Model 8KTA3+. Socket A 6 PCI 1 ISA 4 DIMM ATA 100 - For AMD Processor - retail box Fedex Saver Shipped $140.00 http://www.newegg.com/app/ViewProduc...nufactory=1318


------------------
Farout Man!
Me built System spec`s
Cpu 1.33Ghz Thunderbird
(water cooled)@1.51Ghz!
Mobo IWillka 266R
LeadTek Geforce 3
Ram 768 Megs Pc 2100 cas 2.5
Boot drive 18gig Segate Cheata 15,000 rpm w/card
Dual 80 gig Maxtors
Dual Ibm 60Gxp 60Gigs
Pos 3.5
16x Pioneer Dvd
20x 12x 40x Rhicor burner
Dual 20 Veiwsonics
330 Cfm Alakian FullTower w/500 powersupply
.