Tenda router indicator light: It is normal for the SYS light to flash, but it is a problem if it stays on.

Last month, I helped my cousin rearrange the weak current box and put two routers in it side by side.: Mercury D191G is used as the main router, and Tenda AC10 is used as an AP to bring smart devices in the study. The moment the power was turned on, my cousin was very happy and pointed at the AC10 and asked me: Brother, this desk lamp keeps flashing, is it going to die soon?

I looked closer for two seconds: It flashes quite regularly, once every second. This is Tengda's healthy heartbeat. The system light of his D191G was on quietly and constantly, which was normal. When the two machines are placed together, one is always on and the other is flashing wildly. It does look like one is sick - but the rules set by the two manufacturers for the system lights are originally opposite.

This matter deserves its own article. Tenda users are more likely to misjudge the system light than Mercury, because when searching for "router light keeps flashing" online, most of the answers that come up are Mercury TP series answers. If you use them on Tenda, the direction will be reversed.

Let’s first identify these lights from Tengda.: There are four categories on the panel, each with a section.

Tenda's home machines, regardless of whether they are old or new, don't have many lights. The AC10 generation panel has SYS, WAN, LAN plus a wireless light, and the new AX series has even more severe cuts. Check mark one by one:

There is an original sentence in the FAQ on Tenda's official website, which I copied directly.: Check whether the SYS indicator light is flashing. The normal state is flashing. If it is always on or off, wait for half a minute after powering off and restarting. If it is still on or off, it means the router is faulty. . This is Tenda’s own death sentence standard, which is tougher than any experience I can recount.

The formula is the same as that of Mercury: If the light on the line is always on, it means that the line is connected. If it flashes, it means there is data running. If it is not on, it means that the line is not connected at all. . The WAN light and LAN light flashing are both healthy signs. The only one really at odds with Mercury is SYS.

There is no national standard for lantern language: Four manufacturers, four "normal""

How the system light turns on is hard-coded in the firmware of each manufacturer, and there is no unified standard. I put together four machines that I have touched at home and at my relatives' homes. The "normal" SYS light looks like this.:

Do you see the problem?: The normal appearance of the new Mercury model is exactly the faulty appearance of Tenda. My cousin took his D191G's experience of "always on" as an example to look at the AC10, but he felt that the one that kept flashing was sick.

The reverse is even more dangerous. If someone uses Tenda's rule of "it's normal to only flash" to see Mercury's new cloud router, and see that it is quiet and always on, they may suspect that it has crashed and cut off the power and restarted it - the machine is not sick, but after a lot of trouble, the broadband dial-up has been restarted. The complete rules of the lamp of Mercury, I am The article about Mercury Lantern It has been dismantled inside and can be seen most clearly by comparing the two articles. Xiaomi’s blue, orange and yellow set is another dictionary, in The article about Xiaomi Lantern Language inside.

Therefore, before looking at the system lights, first identify the brand and then compare the watches. Do not directly transfer experience across brands.

When using Tengda as AP, the lights should be read according to the position.

My cousin’s AC10 lamp has another layer of trouble that is easy to see.: It hasn't been the main router for many years. according to Change the AP article According to the connection method here, the incoming line is plugged into the LAN port, DHCP is turned off, and the WAN port is empty without any wires plugged in.

The result is: The WAN light is off, which is its normal state. . That light only detects whether there is a line on the WAN port. Why should it be on when the port is empty? If you look at it based on the rule that "if the WAN light of the main router is not on, it means the network is disconnected", you will misjudge it at first glance.

But the SYS light does not depend on the position. As long as the machine is powered on and the system is running, it will keep flashing. AC10 has been the AP for all these years, and this light has never stopped. So when reading the light of a semi-retired machine, the order is to first ask what kind of work it is doing now.: The incoming line is at the LAN port, so look at the light on the LAN port to see if it is clear. ； SYS is only responsible for telling you that it is alive. I changed the old route at home to the AP and the relay connection method. The article on reemployment of old routes I have written several versions of it. After making the changes, remember to readjust the lights according to the position.

One more detail: When the AP machine has DHCP turned off and the management IP is assigned to it by the main router, and the lights are all normal but the background cannot be accessed, it is probably because the IP has changed. Look for it in the device list of the main router. Don't be in a hurry to reset it. If you really have to go to the reset stage, the rescue list is at the back.

If something happens to the SYS lamp, there are only three types of appearance, and the order of handling is different.

The first type: Always bright and motionless. This is the most typical appearance of a system failure in Tenda, where the system is stuck and does not move. Processing sequence increases all the way: First cut off the power and restart it. Officially wait for half a minute to see it resume flashing. ； If it doesn’t work, go to the official website and download the firmware manually. How to download the Tenda firmware? What should I do if the new version cannot be detected online? I am The firmware article written in ； If it doesn't work then reset. Note that reversing the order will be a waste of time. What can be solved by restarting for thirty seconds, don't just reset it.

The second kind: Just don't light it up. Don't blame the router yet, it's probably because the power supply is not there. Check whether the power adapter is hot and whether the plug is loose. Use a multimeter to measure whether the output is sufficient for the nominal 12V. I have seen such injustices like the adapter aging and the light went out. After sending the machine for repair, I found out that the 30-yuan power supply was defective. If the machine has been used for five or six years, it is not ruled out that it has reached the end of the year. How many years can the router last? What are the signs of aging? I am The life span account Calculate it.

The third kind: Flashing wildly, flashing quickly, faster than usual. This depends on the situation. Tenda's reset button is the same as the WPS button, with a WPS/RST two-in-one silk screen on the back. I pressed WPS at my mother-in-law's house to connect to the printer, but I pressed it too far, and SYS flashed from slow to fast - that's when it was being restored to factory settings. Unplugging the power at this time would really damage it, and I had to wait for it to finish on its own. This rollover is recorded in The article about Tenda reset inside. If no one has touched the button and it flashes wildly, it is a system-level problem and should be dealt with in the first order.

By the way, if the light signal is normal but the network speed is slow and the connection drops out every now and then, that is another matter. First, check the temperature of the case. The method of judging the heat is The actual test article about overheating Here, don’t rely on the light.

The network port light cannot show the speed, and the light cannot be seen in the App.

The WAN and LAN lights are single-color, and only report "no communication, no data", not Gigabit or 100M. There is a hidden problem like Gigabit dropping 100 Mbit, and you can't read a word on the light. You have to go backstage to check the WAN port connection speed, or look at the port plugged into the optical modem. If the old machine dies once a week, setting a scheduled restart can alleviate the problem a lot.

People outside want to know what the Tengda lights at home look like. To be honest: There is no light in the Tenda WiFi App, only the router is online and offline and the device list is visible. If the App cannot even be refreshed online, first press Binding troubleshooting article Check, the boundary of remote management is written in more detail.

Another reverse question: If you think the light is too bright, there is basically no LED switch in Tenda's backend like Mercury. The system light is only available on certain models managed by the firmware. The network port light is directly driven by the switching chip and cannot be turned off by software. To deal with dazzling eyes at night, you can resort to physical means. Cut 4 mm strips of electrical tape, or use light-shielding stickers that cost a few dollars a piece. They are commonly used by everyone. Specifically, Turn off the lights It has been dismantled.

Don’t worry if the network port light flashes wildly in the middle of the night. That means data is being transferred. It is normal for your home devices to be synchronized and backed up in the early morning. The day it stops flashing, it will be your turn to be nervous.

ending: One set of order to take away

Tenda is disconnected, check the lights in this order:

• Identify the machine position first: Look at the WAN light on the main router, and on the modified AP, look at the LAN port where the line comes in.
• Look at SYS: If it flashes regularly, don't touch it. If it stays on, go through the three steps of reboot, firmware, and reset. If it doesn't light up, check the power supply first.
• Look at the WAN or line entrance: If you don’t use the light to check the optical modem, it’s probably about the light path. The optical modem’s lantern language is another dictionary.
• Watch LAN: If it doesn’t light up, change the network cable and port, and check which device is connected to it.
• The lights are all working properly and I can’t log in to the background. That’s a login problem and has nothing to do with the lights.

The light is a triage table, not a verdict. When the repair caller said "SYS light is always on, WAN light is not on, and LOS is flashing red," the technician understood the results of the three-stage positioning, and the equipment brought to the door were different. Looking at Tengda based on Mercury's experience, or vice versa, is the biggest pitfall in looking at lights.