HUB 4 connection/reboot issues

Anyone having problems with HUB 4? Had the same router for some years so probs about ready for a replacement but during the night the internet went down, don't know if my end or VM but all equipment was left on when leaving for work. Came back to HUB still going through rebooting sequence. Tried the usual reset, power down etc. Lights seem to be as they should during reboot except a blue flashing light which is WPS not normal. The reboot never seems to end and keeps a circular continuous sequence. Engineer called but earliest is 48hrs, any ideas would be gratefully received. Cheers