34970a bootloop

[f14]

Hi Guys,
After fix the error code 625 by replace MCU 89s52 with fw from other 34970s . I get new problem. my 34970a keep restart over and over (bootloop) when I install the 34902a card ( this card working good in other 34970a ). 3 slot have same issue .
but when power on without card it can boot up and pass the self test without any error code
have any idea?
thank you

[alm]

Did you check for ripple the power rails, especially with a card installed? I'm thinking it might be dried electrolytics. The increased current draw by the card might cause the ripple to increase.

[f14]

 I'm checked all supply voltage from P302 connector . and seem very normal with/without card (double check with other 34970a). after that I'm try to replace two 2200uf 35v by one 4700uf 35v but nothing happens
maybe problem come frome reset signal from u305 or u304?.

[alm]

Thanks for posting the solution, and congratulations on the fix!