real time clock error check date and time settings

Real time clock error check date and time settings install#

Obtain a replacement cell battery (these parts are very standard) and install in the socket.If present, you are advised to treat the motherboard as broken or dead-on-arrival.Using a magnifying glass, look for damage to surrounding components or electrical tracks.Neutralize the leakage/corrosion area with some baking soda.Carefully clean any leakage/corrosion in the battery holder, using e.g.Remove the leaking clock battery and discard it.Check for signs of leakage underneath the battery, in the holder, and on the motherboard and components around the battery holder. (Just removing the battery will fix symptom #3, when the power LED turns on for under a second). Remove the battery from the socket, by prying underneath with a plastic tool. You can remove this cover by peeling it off. On newer models of the XO-1, the clock battery and its holder may be covered by a circular strip of rubber to try to fix this. Is there any sign of acid leakage? Can the battery move in its holder? To access the clock battery, remove the main battery, and power cable, and follow the instruction for removing the back cover.Įxamine the battery and its holder. Here are English and French diagrams of the process: check the clock is set after removing power.However, the bug strikes before the firmware checks for a new version, so you must repair. For laptops with a lease, they will boot seeking a new lease from the school network. The problem is fixed in the latest firmware, compare the diagram above to the new diagram below, which shows how the latest firmware will respond:įor laptops without a lease, they will boot normally with the date set to 2013. The user set the date to an incorrect value, either by mistake or as an attempt to defeat activation security.Leakage from the battery, causing corrision, a loss of contact between the battery and the metal contacts inside the holder.Some of the early production XO-1 laptops were made with a defective holder for the clock battery, which can come loose or even pop out during normal handling.

The battery discharged during storage.The clock has a 'coin cell' battery (ML1220) that powers the clock when the AC and the main battery are not present. The clock lost all power, which is by far the most common cause.green boxes are deduced causes, or diagnosis,.blue boxes are possible signs, symptoms, or observations,.The following diagram shows the causes of the problem. These symptoms are caused by bad date information stored in the clock. The power LED turns on for only about 0.8 of a second, then turns off, and the screen never turns on.This symptom can only happen with very old versions of firmware ( Q2D05 and Q2D06). The microphone LED may flash briefly, but stays off. The power LED turns on, but the screen never turns on (not even the backlight).Activating the laptop will result in the laptop working temporarily, but returning to the same problem on next boot. The laptop screen lights up and shows 'Invalid System Date' and then powers off, or continues to boot, seeking an activation lease.

Laptops with this problem show one of these symptoms:

5.5 Check the clock is set after removing power.

5.2.4 If the screen does not turn on and nor does the power LED.

5.2.2 If the screen turns on but you cannot enter Linux.

5.2.1 If the screen turns on and you can boot into Linux.

Real time clock error check date and time settings