Sky TV says a technical foul-up affecting "less than 30,000" MySky customers should be fixed by 6pm this evening.
A problem that hit around 4pm yesterday meant some customers lost some free-to-air or high definition channels or lost of high definition viewing on free-to-air channels or SKY channels.
The pay TV broadcaster says "a small group lost viewing on all channels for a short period."
Customers still experiencing problems should reset their decoder and contact SKY. Series link settings should also be checked.