My Honeywell Thermostat Mdel # T8011R displays all the icons at the same time. This occured when returning from an electrical outatge.

IF you cannot see any info on the display at all, it is time for a new thermostat. IF it used to work then the display is most likely bad. It could be the 24 Volt supply to it is the issue and that could be caused by something else pulling too much current. Honeywell T8011R Installation Instructions Manual

Hello, first you must verify if you are getting 24 volts to the tstat at the secondary side of the transformer, if not you have a bad transformer. If you are getting 24 volts then check the batteries in the thermostat.

69-1143 - T8000C, T8001C, T8011R |T8024C Programmable Thermostats

Here is a link for the owner's manual. It gives several suggestions for the cause of the display being blank. Check those and let me know if that helps.
http://www51.honeywell.com/pacific/common/documents/T8000C_T8001C_T8011.pdf

Hi, if the stat is working and running the fan, what has happened is the circuitry is faulty that shows the digital display. Before we are certain this has happened, check to see if the stat has batteries in it. Pull the front cover off and check. If it does, replace them and see if the display returns. If it does great! If not its the circuitry in the stat and will need to be replaced. Keep me posted.
Shastalaker7

Check to see if you have power at the furnace. You thermostat is powered by 24vac coming from the furnace. You should have power on the "R" terminal.

Mike, The static electrical spark probably 'zapped' the Rth230b Honeywell Display unit. If you have already tried removing the power (batteries) from the unit and after waiting several minutes; reapply the power (batteries). If the problems remain unchanged, then it is time to replace the Display unit with a new one. The static electricity problem is problematic and the only way to prevent the same problem from recurring is to discharge yourself before touching the Honeywell Display. As you walk across the room which (probably has carpet), causes the static electricity to build up on your body and then discharges itself through the Display unit when you make contact with the Display unit. You might try coming to a complete stop and attempt to discharge the static charge on your body by touching the wall first with one hand for a second before touching the Display unit with the other hand. Naturally, cold weather with low humidity makes the static electricity worse. Hopes this helps you. Henry

If you need further help, I’m available over the phone at https://www.6ya.com/expert/henry_239f63a136de60f0

Check for either an in-line fuse in the heating unit or a fuse on the control board also in the heating unit.

I have a Honeywell Programmable Thermostat, T8011R. The users guide for the T8000 series can be found at:
http://www.honeywell.com.au/business/acs/acp/ecc/ec/residential/identify.html

To keep your temperature at a single setting, just enter the temperature at every period, i.e. WAKE, LEAVE, RETURN AND SLEEP for both the Monday through Friday time frame and the same for the weekend. I do this at 55 degrees when I'm going to be out of town.
To 'Guest' , enter your 68 degrees at WAKE, LEAVE and RETURN, then enter 66 degrees at SLEEP. Do this for the Monday through Friday time frame and again for the Saturday - Sunday time frame.

I found this link to the program manual at honeywell website:

http://customer.honeywell.com/techlit/pdf/PackedLit/69-1431.pdf