From your description of the fault – it would suggest to me that either your downstairs sockets are not connected or that there is a break in the wiring (to them).
I can only suggest you trace the wiring back to a common point (with the working bedroom) – there may be a plug out of a socket, or not fully home. It would also be worth unscrewing each socket outlet to visually check the wiring. Other than that, you might have to consider replacing the wiring, which can be done fairly cheaply – it is only a question of routing the wiring neatly.
Take care with access to the bare telephone wiring/connections – there can be up to 120Vac from a telephone ringing signal. It probably won’t kill you – but it will certainly wake you up.



