Retuning not holding memory - Grundig GU19WDVDPCX 19 in. LCD TV

We have 2 grundigs tvs with this problem, I have identified the ic as ATMLU736, 64C-1, Z6J51138.

I am unable to find this anywhere on line, does anyone have the equivalant number.

Thanks.

Hello
The memory IC in the circuit of your Grundig is not working. There are two resons for this fault. The first one is, of loss of voltage to that IC. This IC is a non-volatile type [that is, even though the supplied voltage goes OFF, the memory cells inside it will hold the last position memory, will not loss it]. This is a very samll IC, of 8 solder termiminals and can be located very near to the main system control IC. It is drived and memorized by main system control IC, by Serial Data, Serial Clock signals. Fault to this IC is quite normal to most of the TV, irrespective of brand and model number. It is very cheap to buy too, and can be bought from most of the electronic sparepart selling shops at your town. It has a number printed on it, must be noted before buying a new one. In some models of Grundig Tv, this IC will be an SMD [Surcace Mount Device] type. In others, it will be of norma DIN [Dual In Line] type. If the IC soldered to your tV is of fromer type, it cannot be replaced by normal soldering techniques. If it is of second type, it can be desoldered out and can be replaced with a new one. Look whether the type fitted to your TV's circuit is of second type [DIL]. If so you can do the work by yourself at home, provided you must ahve a concept of desoldering and soldering; a good quality DC soldering Iron, and an antistatic desoldering pump, and a very good quality digital multimeter, like Fluke or so. If the type is SMD, no other way other than get this set repaired by any well equipped service center of by the Authorised Service Center for Grundig at your town.
Check the board and confirm the type. Use of a hand glove is recomended when repairing this system control section, as the main system IC is very static to external voltages; even the voltage generated at the tip of human fingers may damage them. There is no other fault with your set, except this IC. The component is cheap to buy, but I don't have an idea about the service charge at your country.
If you haven't enough knoledge and skill to do the work, just get this set repaired by it Authorised Service center.
If you want anymore assistance from me, feel free to get me by Fixya. OK.