Samsung Galaxy S23 Ultra Not Charging & No Signal – What’s Causing It?
If your Samsung Galaxy S23 Ultra is not charging and also has weak or no network signal, you’re not alone—and this isn’t a coincidence. Many S23 Ultra users experience both problems at the same time, and in most cases, they’re connected.
At Phone Chek Brampton, we see this issue frequently. The good news? Once you understand the cause, the solution becomes much clearer.
Why Charging and Signal Issues Often Happen Together on the S23 Ultra
Unlike older models, the Samsung Galaxy S23 Ultra uses a shared flex and connection system where the charging port assembly also plays a role in network signal transmission.
This means:
- When the charging port malfunctions,
- Or the port flex cable is damaged or disconnected,
👉 Charging AND signal problems can occur simultaneously.
Common Symptoms You May Notice
If your S23 Ultra has this issue, you may experience:
- Phone not charging or charging intermittently
- Charging only works at certain cable angles
- “No Service” or weak mobile signal
- Calls dropping or data not working
- Moisture warning messages
- Phone heats up while charging
- Wireless charging works, but wired charging doesn’t
These signs usually point to a hardware-related issue, not a software bug.
Main Causes of Charging + Signal Failure on S23 Ultra
1️⃣ Faulty Charging Port (Most Common Cause)
The charging port assembly in the S23 Ultra is responsible for:
- Power delivery
- Data communication
- Network signal routing via flex connections
If the charging port:
- Wears out
- Gets damaged
- Has internal corrosion
👉 Both charging and signal can fail at the same time.
2️⃣ Water or Moisture Damage
Even light moisture exposure can cause corrosion inside the charging port or flex cable.
Important to know:
- Water damage doesn’t always show immediate failure
- Corrosion can slowly interrupt signal paths
- The phone may work one day and fail the next
⚠️ Moisture damage is one of the top causes of combined charging + signal issues.
3️⃣ Swollen Battery Causing Flex Cable Disconnection (Often Missed)
This is a critical but overlooked issue.
When the battery swells, it can:
- Physically lift internal components
- Push against the charging & network flex cable
- Cause the flex cable to partially or fully disconnect from the motherboard
Result:
- ❌ Phone stops charging
- ❌ Network signal drops or disappears
This issue cannot be fixed with software resets.
4️⃣ Charging & Network Flex Cable Dislodged
After drops, pressure, or internal stress:
- The charging/network flex cable may loosen
- Board connections may become unstable
Even a slight disconnection can cause:
- Intermittent charging
- Random signal loss
What You Can Safely Check Before Repair
You can try these safe checks only:
- Try a known-good original Samsung cable & charger
- Clean the charging port gently (no metal tools)
- Restart the phone
- Check if wireless charging works
❗ If wireless charging works but wired charging doesn’t, this strongly indicates a charging port or flex issue.
When You Should Stop DIY Attempts
Do NOT continue troubleshooting if:
- The phone shows moisture warnings
- Charging stops completely
- Signal drops suddenly
- Phone gets hot while charging
- Battery looks swollen or screen is lifting
Continuing to use the device can damage the motherboard and increase repair cost.
Professional Samsung S23 Ultra Diagnosis in Brampton
At Phone Chek Brampton, we perform proper internal diagnostics, including:
- Charging port inspection
- Flex cable and connector testing
- Battery health and swelling check
- Signal path testing
- Water damage assessment
✔ Free diagnosis (where applicable)
✔ Same-day repair options available
✔ High-quality replacement parts
✔ Experienced Samsung technicians
Can This Issue Be Fixed?
In most cases, YES.
Depending on the cause, the repair may involve:
- Charging port replacement
- Flex cable replacement
- Battery replacement
- Cleaning corrosion from water damage
The key is accurate diagnosis before replacing parts.
Final Thoughts
If your Samsung Galaxy S23 Ultra is not charging and has signal issues, it’s very likely a shared hardware problem, not bad luck. The charging port, flex cable, battery condition, and water exposure all play a role—and these issues often appear together.
The sooner the phone is inspected, the better the chance of a cost-effective repair.
Need Help with Your Samsung Galaxy S23 Ultra Not Charging in Brampton?
Phone Chek Professional Smartphone Repair – Brampton
143 Clarence St Unit 12, Brampton, ON
📞 (905) 226-1789
🌐 https://www.phonechek.ca
👉 Walk in today for Samsung Galaxy S23 Ultra repair in Brampton
Same-day service available for many issues.