32pf5520d/10-Backlight-Failure
A Philips LCD TV 32pf5520d/10 model
The workshop received a television for repair where the picture was absent, but sound and other functions were normal. Investigation revealed a malfunctioning backlight balancer that failed to produce high voltage for the fluorescent lamp. By grounding pin 16 of the IC oz9925gn to disable the green LED protection, the balancer and backlight activated, restoring the picture. Such issues commonly arise in older models due to reduced part tolerances or diminished fluorescent rod value. Although the proper fix is labor-intensive and often not cost-effective for customers, this quick method is typically employed.
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Shaukat Ali has over 30 years of experience in LED TV repair, specializing in chip-level repair work. He is an expert in Sony LED TVs, and also repairs other major brands like Samsung, TCL, Orient, and Haier. His expertise includes display panel faults, motherboard issues, power supply circuits, T-Con, and HDMI faults. Based in Lahore, he shares real-time fault finding cases from daily repair work to help technicians and learners with practical experience.
📞 Contact: +92 321 4066054