Modem + motherboard not working together

[~don~]

Iam having this problem for the past 2 days now.
When i try to turn on my computer in the morning [with my modems on]
it starts but only shows the first black screen [with all the description stuff] and then goes blank. However if i turn off the modem it starts normally.

Ive had this modem for the past 3 months now and did not have any problems before.....
does anyone know why i have this problem all of a sudden

Thanks in advance

 

[Tmagic650]

Are you talking about a phone, cable or a DSL modem?

 

[~don~]

dsl modem .....

 

[Tmagic650]

Does your house phone still work? If so, get another DSL modem from your ISP (Internet Service Provider) and try it