Skip to main content

Brother MFC-490cw unable to print 70

My wife is studying as last year college student and one of her friend knows that I am a software engineer so yesterday she called my wife that the printer was not working.  Its funny I asked her to do a video chat and bring laptop near the printer and show me the issue.

First issue was that she had recently changed the ink so I asked her to take out the cartridge and show me and it seems she hasnt pulled the plastic wrapper in front of ink nozzle.

Now even after removing it the print was not working so I asked her to put something on scanner tray and try to copy it and again it was same issue "Unable to print 70".

It seems real issue was paper stuck issue near the cartridge and I asked her to remove it and volla the problem was solved.


Funnies part of the story was that I was going ROFL when I found unable to print 70 was related  to paper stuck issue, being an engineer I can feel the pain of a non IT user who would not know how the heck to connect unable to print 70 to paper stuck issue. For us its natural that we tweak different things and try again and repeat the cycle until we have found the issue :).

Comments

Popular posts from this blog

RabbitMQ java clients for beginners

Here is a sample of a consumer and producer example for RabbitMQ. The steps are
Download ErlangDownload Rabbit MQ ServerDownload Rabbit MQ Java client jarsCompile and run the below two class and you are done.
This sample create a Durable Exchange, Queue and a Message. You will have to start the consumer first before you start the for the first time.

For more information on AMQP, Exchanges, Queues, read this excellent tutorial
http://blogs.digitar.com/jjww/2009/01/rabbits-and-warrens/

+++++++++++++++++RabbitMQProducer.java+++++++++++++++++++++++++++
import com.rabbitmq.client.Connection; import com.rabbitmq.client.Channel; import com.rabbitmq.client.*; public class RabbitMQProducer { public static void main(String []args) throws Exception { ConnectionFactory factory = new ConnectionFactory(); factory.setUsername("guest"); factory.setPassword("guest"); factory.setVirtualHost("/"); factory.setHost("127.0.0.1"); factory.setPort(5672); Conne…

Spring query timeout or transaction timeout

If you are using spring to manage transactions then you can specify default transaction timeout using

    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
        <property name="defaultTimeout" value="30" /> <!--30 sec--->             
    </bean>

or you can override the timeout in the annotation

    @Transactional(readOnly = false, timeout=30)


or if you are doing it programatic transactions then you can do


DataSourceTransactionManager transactionManager = new DataSourceTransactionManager(dataSource);
transactionManager.setDefaultTimeout(30);

 or you can override the timeout for one particular transaction

TransactionTemplate transactionTemplate = new TransactionTemplate();
transactionTemplate.setTimeout(30);

Python adding pid file

I have a thumbnail generator that launches multiple processes and the correct way to shut it down is to send kill -HUP to the parent process. To automate I had to write a pid file from python, it was a piece of cake
def writePidFile(): pid = str(os.getpid()) f = open('thumbnail_rabbit_consumer.pid', 'w') f.write(pid) f.close()