When the person who built your screens is gone and left no notes, rebuild instead of inherit: inventory every screen and player, get each player's documented factory reset from its maker, then load content from cards or a service under your own login. You end up with screens nobody else can change.
You have taken over a building where the screens play, and nobody can tell you how. The logins, the content files and the schedules all left with whoever built the system. You can spend months working out someone else's setup, or you can rebuild it in two working sessions. A signage system you actually own needs three things: a player you control, content files you can open, and a schedule you can change. This is the order of work that gets you there from a pile of unlabeled boxes, using each maker's documented reset and content that lives in the building.
What you need
- A phone camera, for photographs of what every screen shows now and of every TV and player box.
- A spreadsheet with one row per screen: location, what it plays, TV model, TV input, player model, serial numbers, card or stick fitted, network drop yes or no.
- Blank microSD cards or USB sticks. Content is smaller than you expect: a 1920 x 1080 JPG slide runs about 0.5 MB, so 300 slides is about 150 MB, and 10 minutes of 1080p H.264 video at a common 8 Mbit/s target adds about 600 MB (8 Mbit/s ÷ 8 = 1 MB per second). One 8 GB card holds a term of that with room to spare.
- The maker's documentation for every inherited player. The factory-reset procedure is printed there for each model; use that one.
- For any screen you re-equip, a replacement player: see how to choose a digital signage player for the hardware question and free digital signage software for the software question.
Take stock before you change anything
Walk to every screen before you touch anything. Photograph the picture on screen, the back of the TV, and any box mounted behind it. Read the serial numbers into the sheet. Pull out and photograph any card or stick fitted to a player, because the files on it may be the only copy of the current show. A player with a network cable was most likely managed from a service, and the service login is what left with the old setup.
Budget about 30 minutes per screen. Six screens is one morning; twelve is a full day of walking, photographing and typing.
Screens above doorways, cafeterias and gym floors mean stepladders and mains wiring behind them. Let the maintenance team handle power and anything above arm's reach.
Ask the maker for two things
Before you reset anything, contact the maker of the inherited players and give them the serial numbers. Ask two questions. First: which management service was each unit set up for, and can ownership of that service account move to an email address the school controls? If it can, and the school bought the players through a reseller, the purchase records help prove it, and you can inherit the system properly. Second: what is the documented factory-reset procedure for this exact model? Get it in writing and keep it with the sheet. If the old account cannot be recovered, the reset is the path, and either way you now know what every box is and how to clear it.
Rebuild on hardware you control
Our own player is built for exactly this handover. It plays JPG, PNG or WebP images and MP4, M4V or WebM video straight from a microSD card or USB stick, with no subscription, and it keeps a copy in internal memory, so the show carries on when the card comes out. Details are on the offline signage player page.
Setup is short. Set the player as the home app and it brings the show up full screen at power-on, with no launcher and no keyboard. Rotation is one setting, so the same unit hangs portrait or landscape. Video sound stays off until you turn it on in the settings, which is what a corridor wants. Slides crossfade by default; stretch the fade up to 5 seconds or make it a hard cut. A hidden PIN-protected menu lets staff reload a card or check the screen without opening the case, so the PIN goes to the front office, not the students.
Scheduling is one on time and one off time per day, for example 07:15 on and 16:45 off for a school day. Outside those hours the screen shows black at minimum brightness, because the app cannot switch the backlight off. There is no dayparting beyond that, so a lunchtime-only playlist becomes a slide in the normal rotation. If the app ever stops, it is designed to start again within seconds and go back to playing.
Recover what you can, re-encode the rest
Copy every card and stick you pulled during the inventory before you format anything. JPG and PNG slides drop straight into a new show. H.264 MP4 is the video target, since H.265 and VP9 depend on the unit, so re-encode anything odd before you deploy it. Bitrate is where old footage usually falls over: a 5-minute 1080p clip at a common 8 Mbit/s target works out at 8 ÷ 8 = 1 MB per second, about 300 MB for the file, and one test on the real screen settles it. The video bitrate check for a signage player shows the test.
Content that lived only in a lost account gets rebuilt. School signage is notices, timetables, lunch menus and photos, and one person with a slide tool covers a term in a day. PowerPoint, PDF, HEIC and GIF do not play on our player, so export slides as JPG or PNG.
Example: six screens, two afternoons
Scenario: a school with six TVs, two in the lobby, two in corridors, one in the cafeteria, one in the gym, each fed by an inherited box, no notes anywhere.
Afternoon one is inventory: 30 minutes per screen × 6 screens = 180 minutes, 3 hours, ending with six serial numbers on the sheet and three cards pulled and copied. The maker publishes a documented reset for four of the boxes; the other two are tied to a service account nobody can claim, so those two screens move to players you control.
Content for the corridor screens, read from about 15 ft: the planning figure for legibility is 30 ft of viewing distance per inch of capital letter height (FHWA), so 15 ft ÷ 30 = 0.5 in capitals. For fast reading, use 20 ft per inch: 15 ft ÷ 20 = 0.75 in. On a 24-inch TV that is 1080 px ÷ 11.8 in ≈ 92 px per inch, and 0.75 in × 92 ≈ 69 px, so set corridor headlines at about 70 px or larger.
Afternoon two is the rebuild: documented reset on four boxes, 15 minutes each × 4 = 60 minutes. Mount and set up two replacement players, 20 minutes each × 2 = 40 minutes. Load six cards and set each schedule, 07:15 on and 16:45 off, a 9.5-hour school day, at 5 minutes per screen × 6 = 30 minutes. Total: 60 + 40 + 30 = 130 minutes, one block of about two hours.
Result: four inherited boxes cleared by their maker's own reset, two screens on players and cards the school owns, all six coming up on their own at 07:15, no outside login anywhere, updates by card swap or a push from a computer.
How to check every screen
- Power the screen off at the wall, count 10 seconds, power it back on. The show should come up full screen on its own, with no remote, no login and no menu.
- Leave the network unplugged for a full school day. On our player the copy in internal memory carries the show, so playback should not stop.
- Watch the schedule: black at minimum brightness at 16:45, and the show back at 07:15 the next morning.
- Play the loudest video you recovered. Sound should stay off by default and the picture should hold steady. A black picture with sound points at the file, not the screen: work through why a signage player shows a black screen on video.
- Swap content once: power the player off, swap the card, power it back on. To update without opening cases, send new shows from a computer with the free studio app, or point the player at a playlist on your own web server on a timer.
Write it down this time
The inventory sheet is now the documentation. Finish each row: location, model, serial, player, schedule, what is on the card, and where the source slides live on the shared drive, with the date you rebuilt it. Whoever takes this job after you should be able to run the building from that sheet alone, and a remote signage content workflow keeps the updating side written down too.
Where students can reach the hardware, either mount the players out of reach or use hardware meant to be closed: a locked-down signage player boots into the show and leaves nothing else to poke at.
The decision
Recommendation: Rebuild, and inherit only what the maker's support can hand over. Keep an inherited player when its maker publishes a documented factory reset for the model and the unit takes a new show from a card or stick you control; move the screen to a player you control when it does not. Spend session one on inventory and the support call with serial numbers, session two on resets, cards and schedules, and leave the finished sheet where the next person will find it.
Questions
Can I keep the players the previous setup used?
Usually, yes, if two things hold: the maker publishes a factory-reset procedure for that model, and support confirms the unit is not tied to a service whose ownership cannot move to the school. A reset clears the old show and settings, and the player then takes a new setup from whatever card or service you give it. If neither holds, keep the TV and swap in a player you control.
Some of our screens run signage apps built into the TV. Do they need the same treatment?
Yes. In the TV's own settings menu, look for a factory or data reset for the signage app, then sign the app in with an account the school owns. Note the TV model and serial on the same sheet as everything else. If the app demands a login nobody has and the TV maker's support cannot move it, feed that screen from an external player and treat the TV as a plain display.
How do I handle school breaks and holidays?
The schedule is one on time and one off time per day, so a break needs that pair changed once at the start of the break and again when term restarts. Over a long break, power the screens off at the wall instead; nothing in a card-based setup is lost, and the show comes back at the next power-on. Check the wall switches are not on a circuit a caretaker switches off for other reasons.
Planning information, not legal or engineering advice. Rules differ by place: check codes and permits with your local authority and your licensed trades.