🏷️ Basic Information Identification Make: Acer Model: Aspire 4520/4220/4520G/4220G Year: Unknown (Manual covers multiple generations/revisions) Generation: Not specified (manual covers multiple revisions) 📋 Manual Details General Manual Type: Service and Repair Manual Language: English Page Count: Not specified Format: PDF Download Content Content Type: Step-by-step repair/change procedures Visual Aids: Text and High Quality Graphics/Pictures ⚙️ Engine Specifications Processor Processor Family: Intel Core 2 Duo / AMD Turion 64 X2 (based on model variants) Clock Speed: Varies by specific CPU model (e.g., 2.0 GHz to 2.4 GHz) Graphics Graphics Processor: Integrated Intel Graphics / NVIDIA GeForce (depending on 'G' suffix models) Graphics Memory: Shared System Memory / Dedicated VRAM (depending on GPU) 🔧 Transmission Optical Drive Optical Drive Type: DVD-Super Multi Drive (Common) 📐 Dimensions Physical Screen Size: 15.4-inch WXGA (Typical) Weight: Approx. 2.7 kg (without AC adapter) 🔧 Maintenance Cleaning Cooling System Cleaning: Procedure included Component Replacement Hard Drive Replacement: Procedure included Ram Upgrade: Procedure included Keyboard Replacement: Procedure included Display Assembly Replacement: Procedure included Troubleshooting Common Issues: Covered Diagnostic Steps: Included Battery Battery Replacement: Procedure included