View Single Post
Old 02-21-2020, 06:22 AM   #1
dicky96
Badcaps Veteran
 
dicky96's Avatar
 
Join Date: Mar 2017
City & State: Sunny Gran Canaria
My Country: Spain
Line Voltage: 220V 50Hz
I'm a: Professional Tech
Posts: 725
Default Gigabyte GA-N650SLI-DS4 motherboard not detecting PCI-e graphics card

Hi guys
I have this Gigabyte GA-N650SLI-DS4

It does not have onboard SVGA

With no graphics card fitted it beeps as you would expect then continues to boot (According to the POST test card) to 7F

If I put a graphics card in the PCIe slot nearest the CPU it gets into a loop up to C1, repeats several times, then goes to C3


If i put a graphics card in the other PCIe it beeps to say there is no graphics card, then hangs for a while and eventually boots to FF

I thought there may be some problem with the North Bridge but then I spotted this QFP near the PCI slots that looks somewhat distressed

It's a TSB43AB23 which is readily available on aliexpress for a couple of euros. The datasheet says it transfers data from the 33MHz PCI to IEEE1394
http://www.ti.com/product/TSB43AB23


So obviously I need to replace that. I wonder if it is actually causing all the problems with the PCIe slots as well, I thought PCIe was North Bridge bus and PCI was south bridge? but I will happily believe this could cause problems on the other bus. Also what would cause it to burn out? Someone connect something wrong like a USB to the 1394 header? There is some corrosion on two pins of the 1394 connector as well, maybe something got inside here?

OK so anything else worth checking first or just order a chip?
Attached Images
File Type: jpg IMG_20200221_120426.jpg (860.3 KB, 22 views)
File Type: jpg IMG_20200221_120441.jpg (720.9 KB, 19 views)
File Type: jpg IMG_20200221_120455.jpg (1.08 MB, 27 views)
File Type: jpg IMG_20200221_121839.jpg (720.4 KB, 18 views)

Last edited by dicky96; 02-21-2020 at 06:29 AM..
dicky96 is offline   Reply With Quote