..when connected to power makes a constant low level clicking noise but provides absolutely no function at all. I have 2 yr old twins who may well have done something to it but I can't get a response at all.Unit cost a fortune 18 months ago and has barely been used. Any suggestions?
A clicking noise when there's a hard drive present usually does not bode well for the end user. This noise is lovingly known as the "click of death" and it's name says it all.
I'm wondering if maybe the hard drive has gone and the JVC's error handler does not allow it to progress past POST while there is a hardware error present.
My apologies, I know that this isn't a solution, but hopefully this will at least help answer some of your questions as to what's going on....keep in mind that this is ultimately a guess, however, based on what I do know about electronics hardware.
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If the drive is out of warranty, and you have important data on the drive, and you can't afford to send it to a company to retrieve your files and have tried absolutely everything to get get it off, you can try this: Put the drive (and silicon packs in there if available to absorb moisture) in an air-tight ziplock bag. Place it in the freezer wrapped in a towel for a few hours. (Chilling the drive makes the metal inside the drive contract enough for the arm to function properly)
Remove from the freezer and immediately attach to the computer. If detected, transfer files immediately. The drive will heat up quickly and the mechanical failure will return.
Clutch fluid, commonly referred to as transmission oil or break fluid, is one of the vital liquids required for a vehicle engine to function. Since the fluid level reduces with time during vehicle usage, it becomes necessary to top it off in the clutch reservoir as need arises. But a leak in the clutch reservoir will also result in declining levels. Leaks are more likely to occur at either the slave cylinder or master cylinder, and if left unattended, low fluid levels can cause serious damage to your vehicle. You can ascertain the level by inserting a dipstick in the reservoir; however, certain signs of insufficient fluid will be apparent while driving. Below are six signs of low transmission oil. 6 Symptoms of Low Clutch Fluid DoItYourself com
I'm not sure of what sound it could be making. However, keeping it simple and attempting to answer the question as asked: Check the power steering fluid first. If it's low, add power steering fluid approved for your vehicle to the proper level. Never use transmission fluid as it aerates (like shaking a bottle of dish detergent) and doesn't provide the proper protection. Your van is equipped with a filter in the power steering system.
If the power steering reservoir is at an appropriate level. I would have the front brakes inspected, and/or the Constant Velocity joints inspected, depending the type of noise.
Often over the years the Transformer laminations can loosen, from the on/off rising and collapsing magnetic fields, and then they sorta hum louder. I suspect this is what is going on. Shouldn't be too much of a worry.. keep an eye on it tho.
Problems associated with low power steering fluid… Hard Vehicle Steering A low power steering fluid level can often times cause a vehicle's steering to become hard and labored. Adequate amounts of power steering fluid are necessary to enable a vehicle's power steering system to function and operate at optimum levels. A lack of power steering fluid in a vehicle's power steering system reduces the amount of hydraulic fluid pressure necessary to efficiently operating the various parts of the entire power steering system. Power steering fluid supplies the fluid force needed to operate the power steering gears and to enable power steering gearbox operation. Low power steering fluid levels reduce this hydraulic pressure, which commonly results in hard vehicle steering. Pump Noise It is very common for a low power steering fluid level to cause significant power steering pump noise. An adequate amount of power steering fluid is required to ensure the proper function and longevity of a power steering pump unit, which is a belt-driven pump responsible for housing and circulating power steering pump fluid. A low level of power steering fluid results in increased power steering pump friction, heat, and wear, all of which can significantly reduce the operational life of the power steering pump while at the same time cause excessive power steering pump noise. Fluid Boiling
Many times a low power steering fluid level can result in excessive heating of power steering fluid, a condition that can seriously degrade the fluid and cause it to boil. A low power steering fluid level results in less available fluid to both lubricate and cool a power steering pump unit. A lack of power steering pump lubrication and cooling leads to excessive heat being generated within the power steering pump unit itself, a condition that translates into the available level of power steering fluid becoming super-heated and degraded. When this happens it is common for the power steering fluid to boil and lose all of its lubricating and heat-reducing capabilities.
The power steering gearbox is a set of gears within a vehicle's power steering system designed to facilitate movement of a vehicle's front wheels. The power steering gearbox is connected to the power steering pump by hydraulic fluid lines that deliver a constant supply of power steering fluid to the power steering gearbox. A low power steering fluid level, especially a chronic and severe low power steering fluid level, can lead to increased friction and wear within the power steering gearbox assembly, a condition that can significantly shorten the operational life of the power steering gearbox and negatively affect its operation