First check obvious problems, like wires not being plugged in properly. If you have a working Left but no right, try switching the left and right wires to see if that solves the issue.

Use a multimeter to check the ohms between the positive and negative leads to the speaker. Something between 1 and 16 ohms should be be the resistance of a working speaker. If its 0 or infinity there are likely problems and the speaker may be blown. 

The sound quality of an electronic piano is produced by digital recordings, which can’t replicate the depth or dynamic changes of an acoustic piano. An acoustic piano’s sound varies depending on the player’s touch, giving it more expressiveness, while a digital piano produces a consistent, unchanging sound.

Moreover, acoustic pianos offer complex sustain and tonal variation that digital pianos simply can’t match. Playing an acoustic piano also strengthens hand muscles and improves technique, as the pressure applied to the keys directly impacts the sound. In contrast, digital pianos are less responsive, which can lead to weaker hand technique.

Additionally, the key action on digital pianos can vary greatly, while a well-built acoustic piano ensures a consistent feel across all the keys. For serious pianists, an acoustic piano’s superior sound, dynamic range, and physical benefits make it the preferred choice.

Take the grill off, or figure  out how to expose the speaker cone. Look for obvious problems like cracked or loose parts. Gently without power applied, push the speaker in with your hand gently.  If you hear a crunching noise or if there are loose pieces of dust cap or rubber surround, you may be lucky and you can glue it with something like epoxy or super-glue. Otherwise, you need to order a new replacement speaker or speaker refurbish with a new cone and voice-coil kit.

Hopefully, your speaker recone goes well, and it travels smoothly in and out and lasts for a long time! Keep those limiters in place, and don’t too much level go to the amplifier. Speakers have a finite life, although there are a lot of speakers that are doing well 20 or 30 years later, but protecting your equipment is important to sounding good. Speakers eventually wear out. The rubber surround gets oxidized and cracks, voice coils come loose, or get fried when too much voltage goes into the speaker. Super hot signal can go into the amplifier and clip the input producing a square wave that shoots pure voltage to the speaker frying the voice coil. Old speakers just wear out. The spider and other parts loose elasticity and stop returning the speaker as fast to the resting position. As the speaker ages, it loses it crispness. Oftentimes, a new speaker fresh from the factory or freshly remanufactured with a recone kit, will be very harsh and crispy, then mellow out as the glue and elasticity loosens up.

A visible line across your screen—whether horizontal or vertical—can be a sign of various internal issues. On older CRT (box-type) TVs, this was often related to a failure in the frame amplifier circuit. For modern TVs (LED, LCD, OLED, etc.), it could be anything from a faulty display panel or T-con board to a loose connection or main board issue.

Unfortunately, we can’t give a fixed price without first inspecting the unit. Proper diagnostics with specialized testing tools are necessary to pinpoint the exact problem. Once we’ve checked it out, we’ll let you know what the issue is and provide a quote for the repair.

This kind of issue could be caused by several things—anything from a faulty AV input, signal processing problem, or even an issue with the DVD player itself. Unfortunately, it’s not something we can diagnose without physically inspecting the TV.

To figure out the exact cause, we need to run tests on the workbench using specialized equipment. Only then can we determine what’s going on and suggest the right fix.

Yes, there is a R350 fee for providing a quotation. However, if you decide to proceed with the repair at the quoted rate, this fee will be waived.

Our workshop and field teams regularly diagnose and restore units from Growatt, Luxpower, Kodak, Deye, Sunsynk, Mecer, Victron, Must, Goodwe, AIMS Power, MPP Solar and Voltronic.