mobo or cpu?

[jfoust]

hello all

i am fixing a pc for a friend :

US Product # DA236A
Chassis (Color) Minitower – Silver/Black
Color detail Black/Gray
Microprocessor AMD Athlon XP2200+ 1.8 GHz
Frontside Bus Speed 200/266 MHz
Processor Architecture PGA462 Socket A
Chipset Via KM266
Hard Drive 80 GB Ultra DMA
Drive RPM 5400 RPM
Memory 256 MB DDR SDRAM
Memory Max 1 GB
Memory Speed 2100 MB/Sec
Total DIMM Sockets 2-184 pin
Available DIMM Sockets 0-184 pin open
Primary Cache (L1) 128 KB
Second-Level Cache (L2) 256 KB
Multimedia Drive 16X maximum speed DVD-ROM
CD, DVD Rewritable Drive CD-RW (40X/10X/40X)
Diskette Drive 3.5” (1.44 MB)
Fax/Data Modem Lucent V.92 56K modem
Network Integrated 10/100 Base-T
Keyboard Compaq Internet Keyboard (PS/2)
Mouse Internet Scroll Mouse (PS/2)
Sound Integrated Realtek ALC201 (AC97)
Speakers N/A
Speaker Form Factor N/A
Total Expansion Slots (3) PCI (1) AGP 4X 1.5v
Available Slots (2) PCI (1) AGP 4X 1.5v
Total Drive Bays Ext. (1) 3.5” (2) 5.25” Int. (2) 3.5”
Available Drive Bays (1) 3.5” Int.
Total External Ports (1) Serial (6) USB 2.0 (1) Parallel (2) PS/2
Available External Ports (1) Serial (6) USB 2.0 (1) Parallel
Front Mounted Ports (2) USB 2.0
Video Graphics (AGP) Integrated ProSavage AGP (Via KM266 Chipset)
Graphics Memory 32 MB of DVM
Tower Dimensions 22.25 x 11.25 x 19.875 inches
Power Supply 200 Watts

it won't post - just fans and power lights.

i happen to have a socket a 333mhz mobo from pc chips in my system, so i took their athlon xp 2200+ 266 and installed it in my sys:

Brand PC CHIPS
Model M848A (V5.0)
Supported CPU
CPU Socket Type Socket A (Socket 462)
CPU Type Athlon XP / Athlon / Duron / Sempron
FSB 400(OC)/333/266MHz
Chipsets
North Bridge SiS 746FX
South Bridge SiS 963L
Memory
Number of Memory Slots 2×184pin
Memory Standard DDR 400
Maximum Memory Supported 2GB
Expansion Slots
AGP Slots 1 x AGP 4X / 8X
PCI Express x16 None
PCI Slots 4
Storage Devices
PATA 2 x ATA100 up to 4 Devices
Onboard Video
Onboard Video Chipset None
Onboard Audio
Audio Chipset Realtek ALC655
Audio Channels 6 Channels
Onboard LAN
LAN Chipset VIA VT6103L
Max LAN Speed 10/100Mbps
Rear Panel Ports
PS/2 2
COM 1
LPT 1
USB 4 x USB 2.0
Audio Ports 3 Ports
Onboard USB
Onboard USB 1 x USB 2.0 connector supports 2 ports
Physical Spec
Form Factor ATX
Dimensions 12.0" x 7.5"
Features
Power Pin 20 Pin

after i did, my pc wouldn't post either. naturally i figured it's just the cpu, but i got a little confused after i installed my athlon xp in their sys - it still wouldn't post. i figure if their cpu was good, my sys should've posted with it. but since their sys still wouldn't post with my good athlon xp something else must be wrong. i replaced their ddr sdram with a stick of mine - no success. could the mobo and cpu be bad? any help would be great, thanks.

 

[PC eye]

On your system the bios settings were for another probably faster cpu with the fsb set at the 166 setting. The setting would have to lowered to 133mhz. When a 3200 back clocked to an XP2500 here the system won't run with the fsb set to 200 but will at the 166mhz setting. Likewise the 2200 needs to see the 133mhz setting there to run. With that setting change made a failure to post would show a bad cpu. You forgot to lower the fsb when trying it there unless the cpu was already DOA?

A bad cpu can take out two boards. When a friend saw his system quit one day he sold the cpu figuring the board went. Wrong! The second system saw the board fail when that same cpu was tried there. You could be seeing a dead cpu with two now bad boards unless another cpu is tried out known to be good.

 

[jfoust]

my board is good

my board is still good. once i put my cpu back in my sys it posted and booted like normal. only with my friends cpu installed did it not post or boot. my cpu is an athlon xp 1.1 ghz 200 mhz fsb, so it is actually slower than their 2200 1.8 ghz 266 mhs fsb. both mobos should handle these cpus no problem. his mobo specs definitely support 200 mhz - yet his sys still didn't post with my cpu.

 

[PC eye]

Your friend's cpu may have done the other board in when it went leaving both doa. Or the fsb wasn't lowered for your cpu in order to post properly. With your cpu in that would be the thing to look at if the board is still good.

 

[jfoust]

thanks

that's what i am thinking as well, but if their board is fried, how can i ensure it's set to 200 mhz, shouldn't that be automatic on a recent board?

 

[PC eye]

On the other board you may have to lower the fsb down to 266 in order to see it post. When the 3200 cooked here it spun itself backwards to the slower fsb speed of 333 which in bios terms is 166,hz x 2. Being that it's one of the low end Atholon or Duron models the board may not support it? That's also a thought there. Some boards simply required a faster model with PC2100 or faster memory as the standard.

That would be a PC1700 or slower fsb originally for that model. Some of the Socket As required an XP1800 or 2000+ as the lowest supported. The Asus board used not in the build just replaced but in the plder build replaced early in Q2 of 2006 required a 2000+ there. That would be one thing to consider if the board is still good. But without a post screen you can't enter the bios setup to see the fsb there set to the lowest setting. Having a working board with a cpu already in is where you could then go in to make the changes needed for that.