You turn on your Smart TV, connect your set-top box or gaming console — but instead of your favorite show, you see the message:
“No HDMI Signal.”
The screen is blank, and nothing seems to work no matter how many times you reconnect the cables.
If that sounds familiar, you’re not alone. HDMI signal issues are one of the most common problems in modern LED and Smart TVs, and surprisingly, the cause often lies deeper than just a cable — it could be a motherboard issue.
At TVcaree, our experienced technicians deal with HDMI problems every day — from minor port malfunctions to full motherboard repairs — and in this guide, we’ll help you understand what’s going on and what to do next.
When your TV says “No HDMI Signal,” it simply means that the television isn’t receiving input from the device connected to the HDMI port.
This could be your DTH box, streaming stick, or gaming console. Normally, the problem is either with the HDMI cable, the connected device, or the TV’s HDMI input port.
But if you’ve already checked these and the issue persists, it might point to a hardware fault inside the TV’s motherboard.
Behind every ‘No HDMI Signal’ error is a story your TV’s motherboard is trying to tell — and at TVcaree, we know how to listen and fix it right.
Before jumping into motherboard issues, let’s go through the other possible reasons your TV might not detect an HDMI signal:
If none of these are the culprit, your TV’s motherboard or HDMI port circuit might be the reason.
Think of your TV’s motherboard as its brain. It processes all the signals — picture, sound, input sources, and system functions.
When you connect an HDMI device, the signal first passes through the HDMI port and then gets processed by circuits on the motherboard. If those circuits or the HDMI IC (Integrated Chip) are damaged, your TV can’t read any HDMI input, even if the port looks perfectly fine.
Common motherboard-related causes include:
In these cases, even replacing the cable or input device won’t help — the problem lies inside.
Wondering if your “No HDMI Signal” issue is really a motherboard problem? Here are some telltale signs:
If one or more of these apply, your TV motherboard likely needs repair or replacement.
At TVcaree, our repair process starts with a thorough inspection using diagnostic tools. Here’s how we approach an HDMI issue:
This precision approach ensures that your TV gets repaired safely and effectively, without unnecessary replacements.
While HDMI cables and input settings can be checked at home, motherboard-level repairs should never be DIY.
Modern LED and Smart TVs use complex circuitry, and one wrong step could cause irreversible panel or power damage.
If your TV is showing “No HDMI Signal” despite trying all basic fixes, it’s time to call a professional TV repair service near you.
Here are a few quick tips to keep your HDMI ports and motherboard healthy:
A little care goes a long way in preventing hardware failure.
Q1. Can a faulty HDMI port be repaired without replacing the motherboard?
Yes. If the damage is limited to the port itself, it can often be re-soldered or replaced. But if the HDMI controller on the motherboard is damaged, board repair or replacement is required.
Q2. Why does my TV HDMI port stop working after a power surge?
Power surges can burn the tiny circuits in the HDMI IC on the motherboard, cutting off the signal path. Always use a voltage stabilizer or surge protector.
Q3. My TV has multiple HDMI ports, but none are working. Is that a motherboard issue?
Most likely yes. When all HDMI ports fail simultaneously, the issue is within the motherboard’s signal processing section.
Q4. How much does TV HDMI or motherboard repair cost?
It varies depending on the brand and damage type. At TVcaree, we offer affordable and transparent pricing after proper inspection — no hidden charges.
Q5. Can TVcaree provide doorstep service for HDMI or motherboard issues?
Absolutely! You can book a doorstep TV repair through our website, WhatsApp, or call — and our experts will come to your location.
If your TV says “No HDMI Signal” even after checking cables and devices, the real problem might be hidden inside the motherboard. Don’t risk DIY attempts — let experts handle it with care. At TVcaree, we bring years of experience, genuine spare parts, and a commitment to transparent service to ensure your TV works like new again. 📞 Book Your TV Repair Today:
TVcaree is your trusted destination for LED, QLED, and Smart TV repairs. We provide fast, affordable, and professional service using genuine parts and proven repair methods for lasting performance.
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