I cannot see one picture here...
The µTek, 200 series have oftenly problems with destroyed boards by acid from bad batteries. So clean the ground board very good.
This little scopes was not made for high bandwith. They have other specifications. Look for the sensitivity min. and max. !
there was five different types:
the 211, a single channel .5mc
the 212, a dual channel .5mc
the 213, a single channel 1mc with onscreen DMM (reading true RMS also, directly from the probe!)
the 214, is a 212, but it have a storage CRT, very nice
the 221, a single channel 5mc
I need a 211 t complete the little family here
picture: 212, 213, 214, 221, 222 (DSO)greetings
Martin