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Part 1: The Call | Part 2: The Onsite Repair

IT Neighbour onsite repair

   
Customer: McMaster
Main issue: Intermittent poweroff
Date 17/09/09
Cost £30
Customer Saved £60

The Call

Call time: 15 Minutes

Customer called into IT Neighbour reporting that their system was intermittently powering off. Over a period of 2-3 minutes the customer was asked a set of questions designed to diagnose the issue. Upon further questioning the issue was the final straw in a series of problems. Notably :-

  • Noisy fan
  • slow system
  • System somtimes locked up.
  • poweroffs were sudden and unexplained.

: 1 Minute 45 Seconds into call.

Customer was asked if anything has been changed with the machine or the environment it was in.

  • Problems started not long after they renovated a room.
  • Customer inspected the chassis and found evidence of dust on the outer chassis.

5 Mintes 15 Seconds into call.

Customer inspected the Bios & found CPU temp running at 94°C (201 fahrenheit)

Suspected Thermal Event Shutdown issue.

Customer was advised of thermal issue by tech & advised customer to clean dust from fan vent & grill.

Temperature checked after performing dust blasting & was still fluxuating around the mid 90°Cs

14 Minutes into call.

bicycle pump for blasting away dust.

(bicycle pumps can be used for blasting away dust.)

Customer was advised to inspect the inside of the system for additional dust buildup & clean this using the air pump. Customer declined citing lack of confidence at this point the customer opted to use IT Neighbours onsite services. Since the customer spent the time troubleshooting the issue over the phone, a price could be agreed up front saving the customer the cost of an onsite diagnostic engineer. (Saving £60)

The Onsite Repair

Issue: Suspected thermal cooling failure on a desktop system.

Attend customer's residence to confirm fault & repair issue.

Issue: Suspected thermal cooling failure on a desktop system.

Attend customer's residence to confirm fault & repair issue.

Engineer dispatched to local residence at 19:00 sameday.

Next: Confirming the fault

Inspected temperature in the system BIOS & temperature was an amazing 112°C but before we could cook the marshmallows the system shutdown.

Fault Confirmed. :)

 

Minimum Toolkit

Minimum toolkit- A bicycle pump w/adapter, thermal paste(artic silver 5)Phillips screwdriver w/extension shaft, latex gloves(you'll thank me later- don't blow up the glove like I did)

 

Inspecting the system

Chassis opened & engineer confirmed the presence of some light dusting.(uh oh)

Sometimes a little dust can reduce airflow and restrict fan function. However on this occasion other clumpy matter was found caked onto the heatsink. No bicycle pump was going to shift that.

Our engineer is clearly not a photographer.

Inside the system

Dust caked fan shroud

Now at this stage we could have attacked the fan assembly with compressed air however the dust alone shouldn't cause such a high temperature & like I said "clumpy matter".

Time to unbolt the heatsink assembly.

heatsink assemblyheatsink off

Could it be a thermal conduction issue? (note the gloves)

thermal paste issue?

With the heatsink assembly in hand its time to get a good look at the whole chebang.

Heatsink caked in mud?

Mud- a mixture of dust, sand, grease & animal hairs. Yum!

Arrow to the right

Prime Suspect

The Prime suspect.

After some cleaning, polishing, thermal pasting, heatsink alignment, assembly tightening & proper ducting we seem to have resolved all problems.

Issue resolved hopefully

Machine was given a standard tweak prior to completing the job

unchecked the automatic restart

Our engineer unchecked the automatic restart option in windows which gives users half a chance to capture any error messages in case the shutdown is software related.

Voila Job done - for now - our garauntee means we need to keep an eye on it for 30 Days.

Chris Tierney

Your IT Neighbour. :)

18/09/09

 

 

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Tel: 0141 416 4700

mail@itneighbour.com

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