My display shows the letter F and does not work

You probably have set keyboard repeat delay to "long"

HI,

Did you try replacing the battery?

https://www.askingbox.com/question/my-scales-display-lo-what-does-this-mean


Possibly batteries are reversed, so check again.


My scales display Lo What does this mean

Could be the control panel

Your display can be economically repaired.

Here's a YouTube video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

You are going to have to replace the control board.
http://www.repairclinic.com/
This is relatively simple. The letter J just means the memory in the control board is corrupt.

the best people to seek advice from are the people who showed you how to work it in the first place
call then on the phone

Storing a Name and Number in Memory
1. Press the STORE button on the handset, ENTER NUMBER is displayed.
2. Use the keypad to enter the phone number (up to 32 digits).
3. Press the SELECT button. The display shows ENTER NAME.
Telephone Operation
17
4. Use the touch-tone pad to enter a name (up to 21 characters). More than one letter is stored in each of the number keys. For example, to enter Bill Smith, press the 2 key twice for the letter B. Press the 4 key 3 times for the letter I. Press the 5 key 3 times for the letter L. Press the 5 key 3 times for the second letter L, and press the 1 key to insert a space between the first and last name. Press the 7 key 4 times for the letter S; press the 6 key once for the letter M; press the 4 key 3 times for the letter I; press the 8 key for the letter T; press the 4 key twice for the letter H.
5. Press the STORE button again to save your selection. ENTER LOCATION is displayed.
6. Enter two digits to enter the location, ranging from 01 to 40. For example, to store the record in location #5, press “0”, “5”. After entering a valid location number, the record will be saved. If the memory location you selected is not empty, OVERWRITE? will show in the display. Press the STORE button again to confirm the current record and overwrite the old one or press the EXIT button to select another location.
7. To enter another name and number in a different memory location, return to step 1 and repeat the process.


Good Luck.

FIX ZONE @ SOUND - STUCK ON "ZONE 2 - FIX" 1. Press "Amp" button (right side of remote - 1/3 way down) 2. Press "Menu" button (center of remote - 1/2 way down) 3. Press "TV VOL" button (green letters) until "Manual Setup" is displayed on receiver 4. Press "Enter" button (green letters) 5. Press "TV VOL" button (green letters) until "3 Option Menu" is displayed on receiver 6. Press "Enter" button (green letters) 7. Press "TV VOL" button (green letters) until "D Multi Zone" is displayed on receiver 8. Navigate from there Good Luck! This worked for me.

To Log Into System Programming:
Press FEATURE * * 2 6 6 3 4 4
Enter Password: 2 6 6 3 4 4 Display will read: " A. Configuration"
Using the navigation keys, as displayed below, follow the next simple steps:
Press: NEXT Display will read: "B. General Admin"
Press: SHOW Display will read: "1. Sys speed dial"
Press: NEXT Display will read: "2. Names"
Press: SHOW Display will read: "1. Sys speed dial"
Press: NEXT Display will read: "2. Names"
Press the SHOW Display will read: "Set names"
Press: SHOW Display will read: "Show set:__"
Enter the extension number of which you wish to change the name Display will read: "<##:name>"
Press the CHANGE softkey
Using the dial pad spell out the name Ex: If you need the letter K press the 5 key twice and then press # to confirm the letter. Continue until the entire first name is spelled. (note: you are limited to 7 characters)
Press: NEXT (if you fail to do this step, the name will not be saved!!!)
Press the RLS key

Hope this helps!