Always a good idea to check outlet with cheap circuit analyzer.
And move timer to different outlet to see if difficulties are outlet-specific.
Try timer at neighbor's house.
Having 3 defects in a row is unusual.
There are no repairs for defective timers.
Timer clock motors stop working for many reasons, bad manufacturing of plastic gears and power surge and dirt and reversed polarity among the causes.
Using household plug-in timer is typical solution since clock modules are not sold separately.
Following link gives tips for having low-voltage power pack last longer, in case you decide to buy Intermatic-Malibu from Home Depot:
http://waterheatertimer.org/Malibu-power-pack-stopped-working.html