Tag: fix

Replace iRobot Roomba Battery

I have a robot vacuum, iRobot Roomba 551. I can not recall when I bought it. But, I think it is five years old at least 4 or 5 years. I bought it at Costco. Maybe a little bit over $300 at that time. We use it once a week for three bedrooms in my

Fix the error: Parameter 1 to W3_Plugin_TotalCache::ob_callback() expected to be a reference,

I checked my Nginx log files and saw a lot of errors as below: *11047 FastCGI sent in stderr: “PHP message: PHP Warning: Parameter 1 to W3_Plugin_TotalCache::ob_callback() expected to be a reference, value given in /home/users/yinfor.com/wp-includes/functions.php on line 3597” while reading response header from upstream, I googled it and found the answer. The reason why

Fix Acer AL1916W Monitor

I have a LCD monitor, Acer AL1916W. I can remember when I bought it. But I do believe it is more than six years. I have two more monitor. One is Acer 1716B in early 2006, and Acer X223W in April 2009. So I got  Acer AL1916W between 2006 and 2009. These three monitors are

User Register Error on Joomla 3

If you search by error code: PHP Fatal error: Call to a member function where() on a non-object in /home/username/sitename/joomla/components/com_users/models/registration.php on line 521 and landed here, you are very closed to the solutions. When a new user tried to register, he may received the 500 error. The real error information is behide it. So go